page_title: Saab H engine
section_title: B201
hierarchical_section_title: Saab H engine / B201
caption_attribution_description: SAAB H engine in a 1987 Saab 90
context_page_description: 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.
context_section_description: B201 is the original H engine with two valves per cylinder and a single overhead camshaft. It was introduced in 1981 and unlike the B engine it did not have the central shaft which used to power the distributor, oil- and coolant pump. Instead the distributor is located at the front of the cylinder head and directly driven by the camshaft, while the integrated waterpump was replaced with a separate unit to the rear of the engine.
  It was available with 100 PS (74 kW; 99 hp) at 5200 rpm using a single carburettor, 108 PS (79 kW; 107 hp) at 5200 rpm using a dual carburettor, 118 PS (87 kW; 116 hp) at 5500 rpm using Bosch K-Jetronic fuel injection and a turbocharged, fuel injected version with 145 PS (107 kW; 143 hp) at 5000 rpm. In 1986 an intercooled version of the turbo engine also became available, it produces 155 PS (114 kW; 153 hp) at 5500 rpm.
  Valmet Automotive in Uusikaupunki also planned a downsized 1.6 liter version of B201, to better suit Finnish vehicle tax laws. Downsizing was made by using a narrower cylinder bore. The prototype engine produced 92 PS (68 kW; 91 hp) at 5400 rpm, fitted with Bosch K-Jetronic fuel injection. One such prototype engine is displayed in the Uusikaupunki Saab museum.
caption: Saab H engine (B201) in a 1987 Saab 90
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