GENEVA MOTOR SHOW: Porsche Cayman GT4

Porsche has released its most powerful ever Cayman, powered by a 283kW 3.8-litre flat-six boxer engine that's claimed to take it to a class-leading Nurburgring lap time of just 7:40.

Seen previously in spy shots, the potent new mid-engined coupe makes its world debut at the Geneva motor show on March 3 and goes on sale in Australia from July, priced from $190,300.

That makes it more than $80,000 pricier than the standard Cayman 2.7 ($106,600), over $50,000 more expensive than the 239kW 3.4-litre Cayman S ($139,400), almost $30,000 costlier than the 250kW 3.4-litre Cayman GTS ($160,900) and within $20,000 of the cheapest 911.

But the new GT4's larger boxer six from the 911 Carrera S is far more powerful than all of those models (and the previous-generation 243kW Cayman R), allowing it sprint to 100km/h in a claimed 4.4 seconds and a 295km/h top speed.

The six-speed manual-only two-seater incorporates a host of 911 GT3-style chassis upgrades including a 30mm lower ride height and dynamic gearbox mounts, helping it to lap the Nurburgring a whole 13 seconds quicker than the Cayman GTS,.

NEDC fuel consumption is 10.3L/100km, thanks in part to a more aerodynamic body kit comprising more aggressive front and rear bumpers and prominent fixed rear wing, which together make it the first Cayman to generate downforce at both ends.

Naturally, the track-focussed Cayman also features larger wheels and brakes, plus the option of PCCB ceramic brakes, full shell seats made of carbon-fibre reinforced plastic (CFRP), a custom Sport Chrono Package with the unique Track Precision app and a Club Sport Package.

As standard, there are body-hugging sports seats trimmed in a combination of leather and Alcantara, among a number of GT4-specific interior additions.