When Porsche introduced the 718 Boxster and Cayman, some enthusiasts the world over threw a fit of frenzy over the company’s decision to retire the naturally-aspirated six-cylinder engine in favour of a turbocharged flat-four. The decision to go down the forced induction route was partly due to emissions compliance, but the gains in the performance department is where things start to impress profoundly.

On a regular 718, its 2.0 litre turbo unit makes 300 hp and 380 Nm of torque, which is 35 hp and 100 Nm up from the naturally-aspirated 2.7 litre flat-six in the base 981. The 718 S brings those figures up to 350 hp and 420 Nm from a larger 2.5 litre turbo mill – 35 hp and 60 Nm more than the old Boxster S’ 3.4 litre six-pot despite being nearly a litre down on capacity.

Meanwhile, the engine that equips the 718 GTS is a mid-mounted 2.5 litre four-cylinder that produces 365 hp and 430 Nm. That’s 15 hp and 10 Nm more than the same engine found in the 718 S, and much of this was achieved through a new intake duct and a modified turbocharger.

Compared to its predecessor – the 981 GTS – the 718 GTS has a 35 hp and 60 Nm advantage. Power now peaks at 6,500 rpm and torque arrives much earlier from 1,900 rpm – again, another key benefit of turbocharging. In comparison, the older NA engine’s 370 Nm peaks between 4,500 rpm and 5,800 rpm. Together with a seven-speed PDK transmission, the 718 GTS sprints from 0 to 100 km/h in 4.1 seconds versus 4.7 seconds in the older GTS – both sprint times were done in Sport Plus mode.

Watch the video above for a more detailed look at both the 718 Boxster and Cayman GTS. Are you a fan of the flat-four, or do you prefer the older naturally-aspirated flat-six? Let us know below.