Rolls Royce Phantom 1 (1925 - 1929)
 

Rolls-Royce Phantom I, 1927, H.J. Mulliner Weymann Saloon With the launch of the Rolls-Royce New Phantom in May 1925 it became instantly obvious that Rolls-Royce had put to good effect the experience that the company had learned in the eighteen year production period of the R-R Silver Ghost. Though not just a spearhead of innovation the Rolls-Royce New Phantom, later usually listed as Phantom I, featured an all new pushrod-operated overhead valve engine with detachable cylinder heads. From 7,668 cc the engine provided sufficient power to accelerate from walking pace to top speed. Indeed three of the four gears were almost redundant apart from starting from rest or on Alpine passes. - In this respect as well as in every other detail the New Phantom was a worthy successor to the universally acclaimed Silver Ghost. 2269 Rolls-Royce Phantom I cars were made in the UK. Wheelbase 3658 mm 144 in   Track front 1473 mm 58 in   rear 1473 mm 58 in   Length 5563 mm 219 in   Width 1829 mm 72 in   engine Manufacturer Rolls-Royce Type S-6 Wet sumped OHV 12 valves total 2 valves per cylinder Main bearings 7 Bore × stroke 108.00mm × 140.00mm 4.25 in × 5.51 in Bore/Stroke ratio 0.77 Displacement 7668 cc (467.93 cu in) Unitary capacity 1278 cc/cylinder Fuel system 1 R-R carb Aspiration Normal Max. output 96.3 PS (95.0 bhp) (70.8 kW) @2750 rpm Coolant Water Specific output 12.4 bhp/litre 0.2 bhp/cu in Top speed 145 km/h chassis Engine location Front Engine alignment Longitudinal Steering worm & nut Suspension Front LA.SE. Rear LA.Cant. Wheels F/R 6.75 x 21/6.75 x 21 Tyres F 7.00 x 21 Tyres R 7.00 x 21 Brakes F/R Dr/Dr-S Transmission 4M Drive RWD Top gear ratio 1.00