Unfortunately, Arden hasn’t announced any details on the mechanical updates but it shouldn’t take long. From what we gather, the XF AJ21 will probably get the same heavily modified 4.5-liter supercharged V8 as the XK AJ 20 Coupe that delivers 480 Hp / 353 kW and an awesome torque of 640 Nm or 472 lbs-ft at 3,850 rpm/
Via: Autoblog.nl , Source: Arden