In 1976 the A310 was restyled by Robert Opron and fitted with the more powerful and newly developed 90-degree 2,664 cc V6 PRV engine, as used in some Renaults, Volvos and Peugeots. The car was first shown at the 1971 Geneva Motor Show. The prototype A310 had louvres across the rear windscreen; these were not carried over to the production model.
The later V6 received a black plastic rear spoiler as well, useful for keeping the tail planted but somewhat marring to purity of the original's lines. With 150 PS (110 kW) on tap, the A310 PRV V6 was Renault's performance flagship capable of 220 km/h (137 mph) and acceptable acceleration. The tail-heavy weight distribution gave handling characteristics similar to the contemporary Porsche 911. Beginning with model year 1981 (in late 1980), the rear suspension was shared with the mid-engined Renault 5 Turbo. Rather than the previous three-lug wheels, the A310 also received the alloys used for the 5 Turbo, albeit without the painted elements.
Source: Wikipedia (original)