The production Renault 21 featured engines that ranged from a 1.4L 8V producing a top speed of 165 km/h to a 2.2L 8V that maxed out at 192 km/h. The Superproduction saw an all-new 2L turbo engine with four in-line cylinders producing 430 hp that could reach up to 290 km/h. Other innovations included a blow-off valve derived from F1 and a 2.35m-long carbon fibre driveshaft taken from the Espace Quadra.