The New Arden XKR AJ20

There's a new, fastest Jaguar currently in production, and it is the Arden XKR AJ20.  Testing of the new tuner on a high speed course saw the car's speed top out at 305 km/h (189 mp/h), according to Arden.

Arden says they were able to hit this achievement by rebuilding the eight-cylinder supercharged engine from the ground up, while increasing its displacement to 4.5 litres.  They accomplished this by fitting a custom crankshaft as well as new connecting rods and pistons making 480 bhp and 460 ft-lb of torque at 3850 rpm.   Extensive aerodynamic testing of the XKR AJ20's body modifications show the car getting a better air drag coefficient and higher down force when compared to the Jaguar XK. 

For over thirty years, Arden has fine tuned British cars.  The last twenty years were also dedicated to overhauling Jaguar engines.

Press Release

Arden rebuilds this eight-cylinder engine from scratch and sharpens the claws of this big cat by increasing its displacement.

The displacement increase to 4.5 l is achieved by fitting a crankshaft specially produced for Arden, along with new con rods and pistons. Arden elicits an impressive 480 bhp / 353 kW and an awesome torque of 640 Nm at 3.850 rpm from its supercharged 4.5 l V8 engine.

The Arden body modification underlines not only the powerful character of the Arden XK AJ20 but it also increases the aerodynamic efficiency of this real sport car. The aerodynamic was intensively tested and optimised in the wind tunnel with the effect of a better air drag coefficient combined with higher down force for superb handling.

While testing the AJ 20 on the high speed course at ATP Papenburg a top speed of 305 km/h makes the XK AJ 20 Coupe the fastest Jaguar currently on the road