Pretty sure the car Block drives is based on the European spec Fiesta Rallycross car. The specs for Pat Doran's car are below... I think the rallycross cars have to run a restrictor in the turbo, hence the lower quoted power.
ENGINE 2.0 litre Julian Godfrey Engineering Cosworth YB in-line four cylinder, DOHC, four valves per cylinder, alloy cylinder head, cast-iron block
POWER 550 bhp
TORQUE 608 lb ft
0-60 mph 1.9 sec
0-100 mph 5.2 sec
TOP SPEED 150 mph (Gearing Dependant)
TYRES 8.0 x 18 Avon or Kumho Tyres
BODYWORK Ford Fiesta S1600/JWRC shell modified by Kevlar and Dynema body panels
BRAKES Front and rear: 315 mm Alcon vented and grooved discs with four-pot Alcon calipers
WHEELS Front and rear: 18 x 8 Compomotives
SUSPENSION Front and rear: Reiger linear bearing MacPherson struts, Blade-type anti roll bars front and rear
STEERING Power assisted quick rack and pinion
GEARBOX Six-speed sequential FFD gearbox with viscous centre differential and mechanical plate-type front and rear differentials
CLUTCH Tilton carbon fibre
FUEL TANK 20-litre capacity, ATL FT3
WHEELBASE 2489 mm
WIDTH 1610 mm (track)
WEIGHT 1200 kg minimum