The ACO received 89 entries but after the selection process, withdrawals and no-shows there were 51 cars at the start. The proposed entry list comprised: This year there was a renewed interest from the manufacturers and their works teams with 42 works-supported entries amongst the starters.
Enzo Ferrari was furious when the CSAI, the Italian motor-racing body, would not assist to GT-homologate his 250 LM (the 1964 race-winning car) and vowed to pull his SEFAC Ferrari works team out of the GT Championship. Meanwhile, there were five of the car's successor, the 250 LM, entered by the customer teams. After no wins in the 1964 season, the new year had started with a win for Ford at
Daytona. The new Mk II (also known as the “X-car”) was sent from FAV across to Kar Kraft to get the new engine fitted – the massive 7-litre, 450 bhp, NASCAR racing engine based on a
Ford Galaxie block. Ready just in time for Le Mans, two cars would be raced by
Phil Hill/
Chris Amon and
Ken Miles/
Bruce McLaren. Meanwhile, FAV was tasked with production of the requisite 50 GT40s for homologation. On Shelby's initiative, the GT40s were now fitted with the same 380 bhp 4.7-litre engine as the Cobras (except for the Filipinetti entry) and the
Colotti gearbox that proved unreliable was replaced by the more robust German-made
ZF gearbox. Four cars came to Le Mans: FAV used
Alan Mann Racing with
Innes Ireland /
John Whitmore. Shelby American supported the
Rob Walker Racing Team (
Maglioli/
Bondurant) and the Swiss
Scuderia Filipinetti (
Müller/
Bucknum) who were both also entering Ferraris. Ford France ran an open-top spyder variant for
Maurice Trintignant/
Guy Ligier Once again Maserati France's John Simone commissioned the company to develop a new car for racing. The Tipo 65 was built in only 7 weeks, with a mid-mounted 5-litre engine in a ‘birdcage’ frame. Replacing the destroyed Tipo 59, it left no time to test before the race for its drivers
Jo Siffert and
Jochen Neerpasch The final big-engine entry was the returning Iso Grifo A3C. Originally there were to be three but two cars had been wrecked earlier in the year at Sebring. Porsche had got their desired 185 bhp flat-six engine fitted for their 904 GTS cars, alongside the flat-eight (225 bhp) with three works cars entered and a spare. Opposing them were two British cars – a privately entered Elva and the return of the Rover turbine, first seen in the
1963 race, now categorised as equivalent to 1992cc. It had a new coupé body and ceramic rotary generators as heat exchangers which halved its fuel consumption. It would be driven by F1 drivers
Graham Hill and
Jackie Stewart Curiously, in the small-engine categories, Alpine was the only French manufacturer present. A new model, the M65 had aerodynamic tailfins and a new 1.3-litre Gordini engine that developed 135 bhp pushing it to 250 kp/h (155 mph). It was given to Mauro Bianchi/Henri Grandsire. The other four works cars were a mix of engines and body styles. Their opposition were a pair of the latest Sebring Sprites from Austin Healey. Fitted with the 1293cc engine in the Mini-Cooper S they could reach 240 kp/h (148 mph) In the GT classes Ferrari were now the underdog after being beaten by the Shelby Cobras the previous year, and the races since. Five of the six Shelbys that had been made were at Le Mans, prepared by Alan Mann Racing: two for Shelby American, and one each for Ford France, Scuderia Filipinetti and AC Cars themselves. Cars were being prepared for Ecurie Francorchamps and Scuderia Sant Ambroeus. In the smaller GT classes were the 2-litre Porsche 904s with the homologated 4-cylinder engine.
Autodelta, Alfa Romeo's racing division, brought the Giulia TZ2 rebodied by
Zagato. With its 1.6-litre engine tuned to 170 bhp it could 245 kp/h (152 mph). Finally there was the newly homologated Triumph Spitfire. The factory brought four cars to the race. ==Practice==