YOUR NEXT PORSCHE
Instead of being tempted to bring the 981 GT4’s flat-six back to life, Porsche engineers started work on a new engine for the 718 GT4, taking the 992’s twin-turbocharged three-litre flat-six as the starting point. Snail-shaped bhp boosters were binned straightaway, but an increase in displacement was then required to give the new unit decent midrange torque and drivability, hence there being a wider bore and longer stroke than that of the 911, resulting in swept capacity of 3,995 cubic centimetres. Given its high-revving nature (the rev limiter is set at 8,000rpm, just 400rpm after the engine’s peak 420hp is produced) and remit for withstanding extreme track use, the ‘big end’ was shored up with a high-strength forged steel crankshaft running on
