The joy of six! The new Porsche 718 Boxster GTS and 718 Cayman GTS both get 4.0-litre, 394hp flat-six engines, paired with a six-speed manual gearbox.

718 Cayman

Order books have opened for the recently unveiled Porsche 718 Cayman GTS and 718 Boxster GTS, with first deliveries expected in early March.

In a development that will please Porsche purists, both 718 GTS models use a 394hp, 4.0-litre six-cylinder petrol engine rather than the four-cylinder versions lower down the 718 range. It shifts both GTS models from 0-62mph in 4.5 seconds.

The turbocharged four-pot engine in the standard Porsche 718 Boxster and 718 Cayman models hasn’t been hugely popular with Porsche fans. The new flat-six cylinder engine in the GTS should help to allay that criticism.

718 Cayman Rear

The GTS trim includes black 20-inch alloy wheels with red brake calipers, tinted front and rear lights, a black spoiler lip, a new lower bumper air intake and a new rear bumper. Ceramic brake discs are on the options list.

718 boxster rear

Inside, dark Alcantara covers the sports seats, steering wheel, gear lever and arm rest, and even extends to the roof lining and A-pillars. An optional GTS interior pack allows ‘Carmine Red’ or ‘Crayon’ highlights for the rev counter, seatbelts, stitching and embroidery.

718GTS Interior

Porsche Active Suspension Management (PASM) sports suspension and Porsche Torque Vectoring (PTV), which includes a limited slip rear differential, are both standard kit to improve the GTS’ handling.

As well as Porsche’s PCM infotainment and satnav system, the Sport Chrono pack, which is optional on models further down the range, is included as standard. This includes Porsche’s Track Precision App, which allows drivers to record their track driving data on the PCM display.

718 GTS Boxster Interior

The larger six-cylinder engine in the GTS models adversely affects the 718’s fuel economy, despite cylinder-deactivation technology that can switch off part of the engine to save fuel when full power isn’t required. Both GTS models return 25.9mpg and NEDC-equivalent CO2 emissions of 246g/km.

718 GTS Rear View

The 4.0-litre, flat-six cylinder ‘boxer’ engine has already been deployed successfully in the Porsche 718 Cayman GT4 and 718 Boxster Spyder, but those are extreme models that are more suited to track use. The GTS versions give buyers the option of the six-cylinder engine in the 718, but with a more relaxed, grand tourer feel.