Gasoline Of their eight-cylinder petrol engines, all
Volkswagen Group V8 engines are primarily constructed from a lightweight cast
aluminium alloy cylinder block (crankcase) and cylinder heads. They all use
multi-valve technology, with the valves being operated by
two overhead camshafts per
cylinder bank (sometimes referred to as 'quad cam'). All functions of engine control are carried out by varying types of
Robert Bosch GmbH Motronic electronic
engine control units. These V8 petrol engines initially were only used in cars bearing the
Audi marque, but are now also installed in
Volkswagen Passenger Cars 'premium models'. They are all
longitudinally orientated, and with the exception of the
Audi R8, are
front-mounted.
4.2 V8 FSI 32v Based on the existing Audi 40 valve V8, this new engine is heavily revised over its predecessor, with all-new components including: crankshaft, connecting rods and pistons, cylinder heads, and valvetrain, oil and cooling system, intake and exhaust system, and engine management system. It is available in two versions; a basic or 'comfort' version, first used in the Audi Q7; and a sports-focussed high-revving version, with features borrowed from motorsport, for the
B7 RS 4 quattro and the
R8. This is the first eight-cylinder road car engine to use
Fuel Stratified Injection (FSI), which was successfully developed by Audi in their Le Mans-winning
R8 racing car. The
5.2 V10 FSI was developed directly from this V8 engine. ;identification: parts code prefix/variant: 079.D ;displacement & configuration: 90° V8 engine;
cylinder bank offset; cylinder spacing; bore and stroke: , stroke ratio: 0.91:1 – undersquare/long-stroke, 520.4 cc per cylinder, compression ratio: 12.5:1, firing order: 1–5–4–8–6–3–7–2; water:oil lubricant cooler (RS 4/R8 utilises an additional thermostatically controlled air:oil cooler); Q7 and RS 4 utilise a
wet sump system (RS 4 with additional longitudinal axis flapped baffles controlled by lateral g-force), R8 uses
dry sump ;cylinder block & crankcase: homogeneous monoblock low-pressure chill gravity die casting
hypereutectic '
Alusil'
aluminium-
silicon alloy (AlSi17Cu4Mg) with a closed-deck design, mechanically stripped hard silicon crystal integral liners, honed under simulated mechanical stress; reinforced by a cast lower crankcase alloy bedplate (AlSi17Cu4Mg) mimicking a ladder-frame design, and including five GGG50 nodular cast iron press-fit main bearing caps each attached by four bolts; overall length, cylinder block height; two-stage 3/8" simplex roller chain and gear driven 'accessory drive' which includes the oil pump, water pump,
power steering pump, and air conditioning compressor; baffle-plate sump ;crankshaft, connecting rods and pistons: die-forged and tempered high alloy steel (42CrMoS4) 90° crankshaft with diameter and width main bearing journals and diameter and width big end bearing journals; long high strength forged cracked trapezoidal connecting rods (36MnVS4 in basic engine, ultra high strength 34CrNiMo8 in RS 4/R8 with more restrictive geometry tolerances); forged aluminium pistons with shaped piston crowns designed to impart charged volume tumbling effect for fully homogeneous air/fuel charge ;cylinder heads & valvetrain: cast aluminium alloy, partition-plate horizontally divided intake ports producing a tumble effect (larger cross-section on RS 4/R8); four valves per cylinder: chrome-plated solid-stem (hollow-stem on RS 4/R8) intake valves, and chrome-plated sodium-filled hollow-stem exhaust valves, both with valve lift (longer valve lift on RS 4/R8), 32 valves total; lightweight low-friction roller finger cam followers (uprated with
peened rollers on RS 4/R8) with automatic hydraulic valve clearance compensation, double overhead camshafts (each a hollow tube composite) on each cylinder bank, driven from the flywheel side via a two-stage chain drive using three 3/8" simplex roller chains (sleeve-type on RS 4/R8), valve opening (in crank angle degrees) 200 intake (230 for RS 4/R8) and 210 exhaust (230 for RS 4/R8); valve overlap facilitates integral exhaust gas recirculation; continuous hydraulic vane-adjustable variable valve timing for intake and exhaust camshafts with up to 42 degrees adjustment, each controlled via information from
Hall sensors,
Audi "RS" 'red' plastic cam covers on RS 4, 'anthracite' plastic on R8 ;aspiration: two single-entry air filters each with hot-film air mass flow meters (Q7), or triple-entry single air filter with single hot-film air mass meter (RS 4), or double-entry dual-element single air filter with two hot-film air mass flow meters (R8); single (Q7 & RS 4) or twin (R8) cast alloy
throttle body electronically controlled Bosch E-Gas
throttle valves (Bosch diameter on Q7, Pierburg diameter on RS4), two-stage four-piece gravity die-cast (Q7) (sand-cast on RS 4/R8) magnesium-aluminium alloy variable length intake manifold with electronically map-controlled silicon tipped tract-length flaps along with tumble flaps inducing a swirling movement in the drawn air (RS 4 & R8 do not use a variable tract-length intake manifold) ;fuel system: fully demand-controlled, (Q7 returnless, RS 4 return to tank); fuel tank–mounted low-pressure fuel pump;
Fuel Stratified Injection (FSI): two inlet camshaft double-cam driven single-piston high-pressure injection pumps maintaining a pressure of between in the two stainless steel
common rail fuel distributor rails, eight combustion chamber sited
direct injection solenoid-controlled 65 volt single-hole sequential fuel injectors with integrated swirl plates; 98
RON/ROZ (93
AKI) EuroSuperPlus (premium) unleaded recommended for maximum performance and fuel economy (95 RON (91 AKI) may be used, but will reduce performance and worsen fuel economy) ;ignition system & engine management: mapped direct ignition with centrally mounted longlife spark plugs and eight individual direct-acting single spark coils;
Bosch Motronic MED 9.1.1 electronic
engine control unit (ECU) (two MED 9.1 ECUs in the RS 4 and R8, working on the 'master and slave' concept due to the high revving nature of the engine), four knock sensors, EU4 emissions standard, map-controlled coolant thermostat (Q7 only), additional electric after-run coolant pump with two additional side-mounted radiators (RS 4/R8), water-cooled
alternator, two map-controlled radiator fans ;exhaust system: vacuum-controlled secondary air injection to assist cold start operation; air-gap insulated exhaust manifold per cylinder bank (Q7), or 4-into-2-into-1 fan-branch exhaust manifold per cylinder bank to minimise reverse pulsation of expelled exhaust gases (RS 4), or fan branch manifold with integrated
catalytic converter per cylinder bank; two close-coupled and two main underfloor catalytic converters – ceramic on Q7, high-flow metallic on RS 4, or main catalytic converter integrated into transverse main rear silencer with quad outlets; four heated oxygen (lambda) sensors (broadband upstream, nonlinear downstream) monitoring pre- and post-catalyst exhaust gases; siamesed absorption-type middle silencer (Q7 with crossover) and siamesed rear silencer, separate rear silencers on RS 4 with vacuum-operated flap valves ;dimensions: Q7 (for auto transmission with plate-type flywheel): approx. , RS4 (for 6-speed manual with
dual-mass flywheel): approx. ;DIN-rated power & torque outputs, ID codes, applications : at 6,800 rpm; at 3,500 rpm, 85% available from 2,000 rpm —
BAR: Audi Q7 (03/06-05/10),
Volkswagen Touareg (06/06-05/10);
BVJ: Audi C6 A6 (05/06-08/11),
Audi D3 A8 (06/06-07/10) : at 7,000 rpm —
CAU: Audi S5 (06/07-03/12) : or at 7,800 rpm; at 5,500 rpm, 90% available between 2,250 and 7,600 rpm, 8,250 rpm
rev limiter —
BNS: Audi RS 4 (B7) (09/05-06/08);
BYH: Audi R8 (04/07-09/10; -02/15 for facelift model with 430-hp engine) : at 8,250 rpm; at 4000–6000 rpm, 90% available between 2,250 and 7600 rpm, 8,500 rpm
rev limiter —
CFSA: Audi RS 4 (B8) (06/12-09/15);
Audi RS 5 (06/2010-09/17)
Awards :Was placed in the 2005 and 2006 annual list of
Ward's 10 Best Engines 4.2 V8 40v ;identification: parts code prefix: 079 ;engine displacement & engine configuration: 90°
V8 engine; cylinder spacing; bore x stroke: , stroke ratio: 0.91:1 – undersquare/long-stroke, 520.4 cc per cylinder ;cylinder block & crankcase: homogeneous
monobloc low-pressure gravity die cast
hypereutectic '
Alusil'
aluminium-
silicon alloy (AlSi17Cu4Mg) with a closed-deck design, mechanically stripped hard silicon crystal integral liners, honed under simulated mechanical stress; five main bearings; die-forged steel crankshaft ;cylinder heads & valvetrain: cast aluminium alloy, five valves per cylinder, 40 valves total; lightweight low-friction roller cam followers with automatic hydraulic valve clearance compensation, roller chain-driven double overhead camshafts ;aspiration: synthetic material two-stage
variable intake manifold ;fuel system & engine management: two linked common rail fuel distributor rails, multi-point electronic sequential
indirect fuel injection with eight intake manifold-sited fuel injectors;
Bosch Motronic ME 7.1.1. electronic
engine control unit (ECU); 98
RON/ROZ (93
AKI) EuroSuperPlus (premium) unleaded recommended for maximum performance and fuel economy ;exhaust system: two multi-stage
catalytic converters ;dimensions: length: , mass: ;DIN-rated motive power & torque outputs, ID codes : at 6,600 rpm; at 3,500 rpm, 6,800 rpm max —
Audi A6, BAT, A8:
BFM (BFM engine is belt driven) : at 6,200 rpm; at 2,700–4,600 rpm, 6,500 rpm max —
Audi A6 allroad:
BAS : at 7,000 rpm; at 3,500 rpm —
Audi S4:
BBK (03/03-03/09) : at 7,200 rpm; at 3,000 rpm —
Audi S4:
BHF (03/03-03/09 – US/Korea only) : at 6,500 rpm; at 2,800-3,700 rpm —
Volkswagen Phaeton:
BGH, BGJ (Belt driven) ;applications:
Audi B6 S4,
Audi B7 S4,
Audi C5 A6 allroad (BAS: 07/02-08/05),
Audi C6 A6 (BAT: 05/04-05/06),
Audi A8 (BFM: 10/02-07/10),
Volkswagen Phaeton (BGJ: 05/03-07/03, BGH: 08/03-05/10)
Awards :was placed in the 2004 annual list of
Ward's 10 Best Engines 4.0 TFSI This engine is part of Audi's modular 90° V6/V8 engine family. It shares its bore and stroke, 90° V-angle, and 90mm cylinder spacing with the Audi V6. The earlier V6 engines (EA837) used an Eaton TVS Supercharger instead of turbocharger(s). In 2016, Audi and Porsche released a new turbocharged V6 engine they dubbed EA839. These 2.9L (biturbo) & 3.0L (single turbo) V6 engines share the 4.0T TFSI V8's “hot vee” design, meaning the turbo(s) are placed in the Vee of the engine (between each bank of cylinders) instead of on the outside of each cylinder bank. This allows the turbocharger(s) to produce boost pressure more quickly as the path the exhaust gases travel is much reduced. It also aids in getting the engine's emissions hardware up to temperature more quickly. As with the V6, the V8 is used in various Audi and Porsche models, but the V8 also finds use in Bentley and Lamborghini vehicles. ;engine displacement & engine configuration: 90°
V8 engine; cylinder spacing; bore x stroke: , stroke ratio: 0.95:1 – undersquare/long-stroke, 499.1 cc per cylinder, compression ratio: 10.5:1 ;fuel system;
Fuel Stratified Injection (FSI): Central-Overhead Injectors ;exhaust system: two twin-scroll turbo chargers and twin air- and water-cooled intercoolers ;DIN-rated motive power & torque outputs, ID codes, applications : at 5,500 rpm; from 1,400 rpm to 5,400 rpm—
CEUC: Audi S6 C7,
S7,
CEUA: A8 D4 : at 5,800 rpm; from 1,400 rpm to 5,300 rpm—
CTGA: A8 D4,
A8 D5 : at 5,700 rpm; from 1,750 rpm to 5,500 rpm—
CRDB, CWUB: Audi
RS6 C7 and
RS7 : at 6,200 rpm; from 1,700 rpm to 5,500 rpm (overboost to 750 Nm) —
DDTA: Audi
S8 Plus (D4),
CWUC: Audi RS7 Performance,
Audi RS6 Performance (C7) : at 6,000 rpm; from 1,700 rpm in
Porsche Panamera GTS : at 6,000 rpm; from 1,700 rpm in
Porsche Panamera Turbo : at 6,000 rpm; from 1,700 rpm in
Porsche Panamera Turbo S : at 6,000 rpm; from 1,700 rpm in
Porsche Panamera Turbo S E-Hybrid : at 6,000 rpm; from 1,700 rpm in
Bentley Continental GT V8 and
Flying Spur V8 : at 6,000 rpm; from 1,700 rpm in
Bentley Continental GT V8 S : at 6,000 rpm; in
Bentley Continental GT V8 (2019–) : at 6,000 rpm; in
Lamborghini Urus : at 6,000 rpm; Porsche Cayenne Coupé Turbo GT : at 6,000 rpm; in Bentley Continental GT Speed Audi version of the engine includes electronic monitoring of the oil level, while the Bentley engine includes a dipstick for an oil check. In addition, the Bentley engine uses switchable hydraulic mounts instead of Audi's active electrohydraulic engine mounts. The Bentley engine does not include a stop-start system.
Diesel 4.2 V8 TDI CR 235-257kW This Audi engine is an entirely redeveloped and
bored-out evolution of the superseded
4.0 V8 TDI CR, now with cylinder spacing between bore centres, and again with roller chain drive for the
overhead camshafts and ancillaries. Just like its 4.0 V8 TDI predecessor, this all-new 4.2 V8 TDI retains the mantle of the world's highest power output car with a diesel V8. This engine is manufactured at
Győr, Hungary by AUDI AG subsidiary
Audi Hungaria Motor Kft. ;identification: parts code prefix: 057.C ;engine configuration & engine displacement: 90°
V8 engine,
Turbocharged Direct Injection (TDI) turbodiesel; ; bore x stroke: ,
stroke ratio: 0.87:1 - undersquare/long-stroke, 516.7 cc per cylinder, cylinder spacing, compression ratio: 16.5:1, water-cooled alternator ;cylinder block & crankcase:
compacted vermicular graphite cast iron (GJV/CGI), ; UV laser-honed exposed bore; cast reinforcing bed-plate lower frame incorporating five
main bearings (each 'bearing' affixed by four bolts), die-forged chrome molybdenum alloy steel
crossplane crankshaft with first and second order forces and moments avoided, three-part oil sump consisting of cast alloy upper section, a middle baffle section and pressed steel lower section, diagonally fracture-split
connecting rods, cast aluminium alloy Kolbenschmidt pistons (
Mahle on CCFA), simplex roller chain-driven ancillaries,
oil filter module (incorporating oil separator and water-to-oil cooler) mounted within the 'vee' (externally mounted on Marine variants) ;cylinder heads &
valvetrain: cast aluminium alloy;
four valves per cylinder, 32
valves total, operated by low-friction roller finger
cam followers with automatic hydraulic
valve clearance compensation,
double overhead camshafts - the inlets driven in a relay method at the rear (flywheel) end of the engine by four simplex roller chains and the exhausts driven from the inlets by automatic slack adjusting spur gears at the front end, two unequal-length swirl-inducing switchable inlet ports, siamesed unequal-length exhaust ports ;aspiration - automotive: two air filters, two hot-film
air mass meters, '
biturbo': two water-cooled
turbochargers with electrically direct-actuated
Variable Turbine Geometry (VTG) vanes (one turbo per cylinder bank) operating up to 226,000 rpm with a maximum electrically regulated boost of , two side-mounted air-to-air fan-assisted (not on Q7) intercoolers (SMICs), two separate cast alloy
intake manifolds interconnected by a "feedthrough" system to equalise the pressure in the two cylinder banks, two-position variable swirl flaps integrated into the intake tract. Engines introduced from 2014 include 2 variable geometry turbocharger with maximum of relative boost pressure. ;aspiration - Marine: air filter with hot-film
air mass meter, one water-cooled turbocharger with electric boost pressure control mounted within the vee, sea-water tube intercooler, two separate cast alloy intake manifolds interconnected by a "feedthrough" system to equalise the pressure in the two cylinder banks, two-position variable swirl flaps integrated into the intake tract ;fuel system & engine management:
common rail (CR) direct diesel injection: electric low-pressure
fuel lift pump, one
timing belt-driven
injection pump, two common rail fuel rails (one per cylinder bank),
piezo-electric operated fuel injectors with eight-hole nozzles for homogenous fuel delivery, single and double pilot injection, up to four main injection actuations per piston cycle;
Bosch EDC16 CP electronic
engine control unit (ECU), Bosch MDC Marine Diesel Control on Marine variant. Engines introduced from 2014 has increased fuel pressure to . ;
exhaust system: two air-gap insulated fan-branch alloy steel
exhaust manifolds, two close-coupled maintenance-free oxidizing
catalytic converters, two silicon carbide
diesel particulate filters, Euro4 emissions standard compliant ;dimensions: length: , mass: (automotive - lighter than its 4.0 V8 TDI predecessor, lighter than the all-aluminium alloy
Mercedes-Benz 4.0 V8 CDI diesel engine), (Marine variant: dry weight, including DMF, cooling system & all ancillaries) ;DIN-rated power & torque outputs, ID codes :
BMC: :
BVN: at 3,750 rpm; at 1,600-3,500 rpm :
BTR: at 3,750 rpm; at 1,800-2,500 rpm :
CCFA: :
CEM: at 4,200 rpm; at 1,900 rpm :
CTEC: at 3,750 rpm; at 2,000-2,750 rpm :applications :
Audi D3 A8 4.2 TDI quattro (BMC: 01/05-06/05, BVN: 07/05->),
Audi Q7 4.2 TDI (BTR: 03/07-06/09, CCFA: 06/09->),
Volkswagen Marine TDI 350-8 (CEM: 02/09->),
Volkswagen Touareg,
Porsche Cayenne 4.0 V8 TDI 310-320kW A successor to the 4.2 TDI. The engine includes 2 turbochargers, 48-volt electrical system, 7 kW
electric compressor, Bosch CRS 3.25 engine management. A turbocharger serves to supply engine boost and spools up the passive turbocharger. ;identification : parts code prefix: EA 898 ;engine configuration & engine displacement: 90°
V8 engine,
Turbocharged Direct Injection (TDI) turbodiesel; ; bore x stroke: ,
stroke ratio: 0.91:1 - undersquare/long-stroke, 494.5 cc per cylinder, cylinder spacing,
compression ratio: 16.0:1, water-cooled alternator
DIN-rated power and torque outputs, applications, ID codes at 3,500-5,000 rpm; at 1,000-3,250 rpm,
Porsche Panamera II 4S Diesel at 3,750-5,000 rpm; at 1,000-3,250 rpm,
Audi SQ7 2016-2020,
Audi SQ8 2019-2020,
Audi A8 D5,
Bentley Bentayga,2020-
VW Touareg Production The engine was developed in Ingolstadt. ==Racing engine==