Number produced: 18 Original Specification: 8 cylinders (in-line), overhead inlet and side exhaust valves, 92 mm. x 114.3 mm (5675 c.c ), single-plate clutch. 4 speeds, brakes hydraulic front and mechanical rear with servo, suspension independent front and semi-elliptic rear, wheelbase 145". tyres 7.00 x 17. Phantom IV Number produced: 18 Original Specification: 8 cylinders (in-line), overhead inlet and side exhaust valves, 92 mm. x 114.3 mm (5675 c.c ), single-plate clutch. 4 speeds, brakes hydraulic front and mechanical rear with servo, suspension independent front and semi-elliptic rear, wheelbase 145". tyres 7.00 x 17.