Lotus 900 series

900 series
Overview
Manufacturer	Lotus Cars
Production	1972–1999
Layout
Configuration	Inline-4 (Types 904, 905, 906, 907, 910, 911, 912, 920) V8 (Types 909, 918)
Displacement	2.0 L; 120.4 cu in (1,973 cc) 2.0 L; 121.5 cu in (1,991 cc) 2.0 L; 121.7 cu in (1,994 cc) 2.2 L; 132.7 cu in (2,174 cc) 3.5 L; 213.9 cu in (3,506 cc) 4.0 L; 244.8 cu in (4,011 cc)
Cylinder bore	83 mm (3.27 in) 84.45 mm (3.325 in) 95.25 mm (3+3⁄4 in)
Piston stroke	69.24 mm (2.726 in) 69.85 mm (2+3⁄4 in) 70.3 mm (2.77 in) 76.2 mm (3 in) 81 mm (3.19 in) 89 mm (3+1⁄2 in)
Cylinder block material	Iron (Types 904, 905) Aluminium (all others)
Cylinder head material	Aluminium
Valvetrain	DOHC 4 valves x cylinder
Compression ratio	7.5:1, 8.0:1, 8.4:1, 9.4:1, 9.5:1, 10.9:1
Combustion
Turbocharger	Single/Twin Garrett AiResearch T3 (in Lotus Esprit)
Fuel system	Dell'Orto 40 DHLA carburettor EZenith-Stromberg carburettors Tecalemit-Jackson mechanical fuel injection Delco GMP4 Electronic FI
Management	Lucas, Bosch KE-Jetronic
Fuel type	Petrol
Oil system	Dry sump Wet sump (reverted in 1982)
Cooling system	Water-cooled
Output
Power output	140–350 hp (104–261 kW)
Torque output	140–295 lb⋅ft (190–400 N⋅m)
Dimensions
Dry weight	214–414.5 lb (97.1–188.0 kg)
Chronology
Predecessor	Lotus-Ford Twin Cam

The Lotus 900 series is a family of internal combustion engines designed and built by Lotus Cars of United Kingdom. Successor to the Lotus-Ford Twin Cam, the 900 was the first complete engine developed by Lotus. The engine was built from 1972 to 1999.^[1]