The GT3 RS's naturally aspirated 4 -
litre flat - six is carried
over from the
previous - generation
car (and the current GT3), with power increasing by 20bhp to 513bhp at 8450rpm (200rpm higher than its predecessor) and torque rising by 7 lb ft to 346 lb ft.. There's a new titanium exhaust with 91 mm diameter pipes, a revised intake system and a new engine management system that account for the slightest of gains in the sprints (at 3.2 seconds it's a tenth quicker than the old
car to 62mph) but will have a bigger impact on the
car's as - yet - undisclosed Nürburgring lap time.
Despite extensive changes
over the standard BMW 4.4 -
litre there were some cost cutting measures on the engine — it had the standard
car's cast iron exhaust manifolds for example, where all
previous M engines had had bespoke works of art to expel their exhaust gases.