BMW S14
Encyclopedia
The BMW
S14 is a 2.3 L (2302cc) DOHC 16-valve I4
piston engine. It was used in the E30
M3
. The S14 is essentially a BMW M10
basic engine block casting with modified oil drain back passages and a M88/S38
DOHC cylinder head (minus two cylinders). It has four separate throttle bodies. It developed 195 PS (143 kW/192 hp), or 200 PS (147 kW/197 hp) without a catalytic converter
. A special tuned model, the S14 EVO producing 20 PS more. The 2.3 L version has a 93.4 mm bore and 84mm stroke.
Variations of this engine included a limited-edition 2.5 L (2467 cc) Sport Evo for motorsport homologation
requirements, and a 2.0 L (1990cc) version with stroke reduced to 72.6 mm (often described incorrectly as being "sleeved" or of reduced bore) for the 320is, a sports model made specifically for the Portuguese and Italian markets. The 320is can be quickly distinguished from the E30 M3 by the absence of flared wheel arches.
BMW
Bayerische Motoren Werke AG is a German automobile, motorcycle and engine manufacturing company founded in 1916. It also owns and produces the Mini marque, and is the parent company of Rolls-Royce Motor Cars. BMW produces motorcycles under BMW Motorrad and Husqvarna brands...
S14 is a 2.3 L (2302cc) DOHC 16-valve I4
Straight-4
The inline-four engine or straight-four engine is an internal combustion engine with all four cylinders mounted in a straight line, or plane along the crankcase. The single bank of cylinders may be oriented in either a vertical or an inclined plane with all the pistons driving a common crankshaft....
piston engine. It was used in the E30
BMW E30
The BMW E30 was a compact executive car produced by BMW. It was replaced by the BMW E36 in 1990. BMW continued to produce the cabriolet E30 well into 1993. The Touring remained in production until 1994 when the E36 touring replaced it...
M3
BMW M3
The BMW M3 is a high-performance version of the BMW 3 Series, developed by BMW's in-house motorsport division, BMW M. M3 models have been derived from the E30, E36, E46 and E90/E92/E93 3-series, and sold with coupé, sedan and convertible body styles...
. The S14 is essentially a BMW M10
BMW M10
The BMW M10/M12 was a straight-4 piston engine produced from 1961 to 1987. Displacement ranged from 1499 cc to 1990 cc.The engine was designed by noted engineer and race driver Baron Alex von Falkenhausen. He was asked to design a small-displacement engine, but felt that this would be...
basic engine block casting with modified oil drain back passages and a M88/S38
BMW M88
The BMW M88/3 is an in line 6 cylinder piston engine. It was based on the M88/1 that was used in the BMW M1's street version, with double overhead cam and four valves per cylinder. The M88/1 was in turn based on the M49 engine which was used in the BMW 3.0CSi...
DOHC cylinder head (minus two cylinders). It has four separate throttle bodies. It developed 195 PS (143 kW/192 hp), or 200 PS (147 kW/197 hp) without a catalytic converter
Catalytic converter
A catalytic converter is a device used to convert toxic exhaust emissions from an internal combustion engine into non-toxic substances. Inside a catalytic converter, a catalyst stimulates a chemical reaction in which noxious byproducts of combustion are converted to less toxic substances by dint...
. A special tuned model, the S14 EVO producing 20 PS more. The 2.3 L version has a 93.4 mm bore and 84mm stroke.
Variations of this engine included a limited-edition 2.5 L (2467 cc) Sport Evo for motorsport homologation
Homologation
Homologation is a technical term, derived from the Greek homologeo for "to agree", which is generally used in English to signify the granting of approval by an official authority...
requirements, and a 2.0 L (1990cc) version with stroke reduced to 72.6 mm (often described incorrectly as being "sleeved" or of reduced bore) for the 320is, a sports model made specifically for the Portuguese and Italian markets. The 320is can be quickly distinguished from the E30 M3 by the absence of flared wheel arches.