Small improvements in 1958 Even though the exterior remained little changed during its life, the car nevertheless underwent various improvements. When production restarted after the 1958 summer holiday shut-down, the interior mirror had been moved from its position on the top of the dashboard to a position at the top of the windscreen, improving the rear view for most drivers. It was also in 1958 that the windscreen wipers received their own electric motor: hitherto they had been mechanically powered from the camshaft with the help of a flexible linkage, a solution which Opel had first employed in 1937 on the
Super Six.
Upgraded engines in 1959 For 1959 the engines were upgraded. The Opel Olympia Rekord P1 (by now badged simply as the Opel Rekord) retained its 1,488 cc engine size, but claimed maximum power was now 50 hp at 4000 rpm. Responding (presumably) to the steady increase in the octane of standard fuel at this time, the compression ratio on the 1,488 cc engine was also raised from 6.9:1 to 7.25:1. The power increase was also helped by modifications to the cylinder head and exhaust manifold. Nevertheless, in most respects the 1,488 cc engine remained little changed since Opel had first installed it in the 1937
Opel Olympia. 1959 was also the year that a larger engine was available as an option. It shared the 75mm stroke of the 1,488 cc engine (and of the 1,196 cc engine fitted in the down-market Olympia and 1200 models) but the bore was increased from 80 to 85 mm, providing an increase in engine capacity to 1,680 cc. Maximum speed, which was given as 125 km/h (78 mph) for the 1,488 cc power car, was raised to 132 km/h (82 mph) with the larger engine which also offered a useful increase in available torque.
Semi-automatic optional from 1959 For its final year, the P1 was offered with an "Olymat" automatic clutch provided by
Fichel & Sachs. The system was broadly similar to the "Saxomat" automatic clutch beginning to be offered at this time by other German automakers. On the Opel it was not particularly popular. ==Swiss assembly==