Saab H engine

Saab H engine
Naturally aspirated B202 16 valve engine in a 1986 Saab 900
Overview
Manufacturer	Saab Automobile (1981-2009) BAIC (2009-present)
Also called	Ecopower Family III engine
Production	1981–2010
Layout
Configuration	Inline-4
Displacement	1,799 cc (109.8 cu in) 1,985 cc (121.1 cu in) 2,119 cc (129.3 cu in) 2,290 cc (140 cu in)
Cylinder bore	85.7 mm (3.37 in) 90 mm (3.54 in) 93 mm (3.66 in)
Piston stroke	78 mm (3.07 in) 90 mm (3.54 in)
Cylinder block material	Cast iron
Cylinder head material	Aluminum
Valvetrain	SOHC 2 valves x cyl. DOHC 4 valves x cyl.
Compression ratio	8.8:1 9.2:1 9.25:1 10.0:1 10.1:1 10.5:1
Combustion
Turbocharger	Garrett T25 Garrett GT1752S MHI TD04HL-15G-6 (in some versions)
Fuel system	Carburetor, Fuel injection
Management	Bosch K-Jetronic Bosch LH-Jetronic Lucas CU14 Saab Trionic
Fuel type	Gasoline
Oil system	Wet sump
Cooling system	Water-cooled
Output
Power output	92–310 hp (69–231 kW; 93–314 PS)
Torque output	177–440 N⋅m (131–325 lb⋅ft)
Emissions
Emissions target standard	Euro 6 (BAIC)
Emissions control systems	Catalytic converter, EGR
Chronology
Predecessor	Saab B engine
Successor	GM Ecotec engine

The Saab H engine is a redesign of the Saab B engine, which in turn was based on the Triumph Slant-4 engine.

Despite the name it is not an H engine or horizontally opposed engine, but a slanted inline-4. The H engine was introduced in 1981 in the Saab 900 and was also used in the Saab 99 from 1982 onwards. H stood for high compression; higher compression was part of the update from B to H engine. It continued in use in the 900/9-3, 9000, and 9-5. The 2003 GM Epsilon-based 9-3 switched to the GM Ecotec engine, leaving the 9-5 as the sole user of the H engine. The H family of engine was used in the first-generation 9-5 until it was discontinued in 2010. The tooling and know-how was sold to BAIC. The latter B2X4 and B2X5 engines have in practice nothing in common with the early B engines except cylinder spacing.

All versions feature a grey cast iron block and an aluminum head with a single or double overhead chain driven camshafts. SOHC engines use two valves per cylinder and DOHC versions use four valves per cylinder with a pentroof chamber, the valve angle being 22 degrees from vertical. All engines use flat inverted bucket type valve lifters, hydraulic in the case of DOHC engines.

The engines were given numbers, for instance B201 is a 2.0-litre (20) engine with one camshaft.