By way of comparison, the previous Boxster GTS delivered 335bhp at 7400rpm and just 280lb ft at 4750rpm, so despite ditching two cylinders, the new engine is not only more powerful but brings a load more torque to the party, too.
Porsche says the four-cylinder is similar in weight to the old six-cylinder, owing to the plumbing associated with its turbocharger and larger exhaust. Even so, the new 718 Boxster GTS is 30kg heavier than the old Boxster GTS, at 1405kg. Interestingly, this is the same weight as the 718 Cayman GTS, so despite its folding roof, the Boxster apparently gives nothing away to its coupé sibling.
Distinguishing the GTS from the S are a series of subtle styling changes. These include a lightly altered front bumper, black tinted lights, a more prominent diffuser and centrally mounted black tailpipes as part of a standard sports exhaust system.
There are also black GTS badges at the base of the doors, black 20in alloy wheels shod with 235/35 tyres up front and 265/35 tyres at the rear and a 10mm reduction in ride height as part of the chassis changes brought on by the standard adoption of Porsche’s Active Suspension Management (PASM) system.
What's it like?
There's a lot to like about this car before you even turn the key. Not least the driving position, which is among the best you’ll come across in any car, providing a fittingly sporting feel right from the outset.
On the move, the GTS's mid-mounted engine has nearly every base covered. It's wonderfully responsive at lower revs around town, magnificently flexible through the mid-range and fantastically eager when you’re able to explore its redline with a heavy dose of wide-open throttle. It's the wholesale increase in torque and its ease of accessibility, not the outright power or the linear power delivery, that moulds the driving experience.
But there are issues, with one in particular hard to ignore: the sound of the compact four-cylinder, which can only be described as disappointing. It's a flat and muffled tone that gets deeper and more throaty the more you work it, never reaching the sonorous heights of the old six-cylinder. In any of its driving modes, the undistinguished exhaust tone is the one element that lets this otherwise tremendously engaging car down.
That's a shame, because the rest of the 718 Boxster GTS is phenomenal – not just its sheer driveability, improved acceleration and compelling all-round performance, but also its steering accuracy, handling sharpness and stunningly effective braking ability.