Naturally aspirated B202 16 valve engine in a 1986 Saab 900
Overview
Manufacturer
Saab Automobile (1981-2009)
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
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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.
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