Nought to 60mph in 3.9 seconds? Check. One hundred and seventy miles per hour top speed? Check. Seventy miles per gallon? Check.

Eh? We're talking about a supercar, right?

Ah, but the Trident Iceni is not your average supercar.

The key to its huge performance and superb economy is the unusual powerplant: a 6.6-litre V8 turbodiesel more normally found in American GM pick-up trucks.

The weirdness continues with the Iceni's eight-speed automatic gearbox that copes with the 375bhp and 520lb ft of torque.

To prove the Iceni's economy credentials, the firm is filling up its demonstrator with 100 litres of bio-diesel fuel and driving it to Monaco (some 900 miles).

The idea is to get to Monaco on a single tank, with the filler officially sealed to prevent any sneaky fill-ups.

The car is due to leave Trident's Norfolk base on April 17 before it goes on display at the Top Marques International Motor Show from April 19-22 in Monaco.

Trident is now taking orders for the £60,000 Iceni.