The Saab B230FIS is a 2,290 cc, inline‑four turbocharged petrol engine produced between 1990 and 1993. It features a cast-iron block, aluminum cylinder head, single overhead camshaft (SOHC), and Bosch LH2.4 electronic fuel injection with an intercooler. In standard form it delivered 147 kW (200 PS), offering a significant power boost over its naturally aspirated sibling for enhanced performance.
Fitted exclusively to the Saab 9000 Aero, the B230FIS was engineered for spirited driving and high-speed stability. Emissions compliance was achieved through precise electronic fuel injection and a catalytic converter, meeting Euro 1 standards for its production period. Its robust bottom end and efficient turbo system made it a favorite for enthusiasts seeking factory-tuned performance.
One documented engineering focus is managing boost pressure consistency, addressed in Saab Service Bulletin SB‑91‑07. This bulletin details a revised wastegate actuator and associated vacuum hose routing to mitigate boost creep under high load. The engine was a final evolution of the B230 series before being succeeded by the DOHC B234 engine.
All production years (1990–1993) meet Euro 1 standards (VCA UK Type Approval #VCA/EMS/2346).
The Saab B230FIS is a 2,290 cc inline‑four turbocharged petrol engine engineered for premium performance sedans (1990-1993). It combines a robust cast-iron block with an intercooled turbo system to deliver strong, linear power. Designed to meet Euro 1, it balances exhilarating performance with mechanical simplicity.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 2,290 cc | |
| Fuel type | Petrol | |
| Configuration | Inline‑4, SOHC, 8‑valve | |
| Aspiration | Turbocharged with Intercooler | |
| Bore × stroke | 96.0 mm × 79.0 mm | |
| Power output | 147 kW (200 PS) @ 5,500 rpm | |
| Torque | 285 Nm @ 2,100 rpm | |
| Fuel system | Bosch LH2.4 Electronic Fuel Injection | |
| Emissions standard | Euro 1 | |
| Compression ratio | 8.5:1 | |
| Cooling system | Water‑cooled with belt-driven pump | |
| Turbocharger | Garrett T3 with intercooler | |
| Timing system | Chain‑driven | |
| Oil type | SAE 10W-40 (Mineral or Semi-Synthetic) | |
| Dry weight | 175 kg |
The turbocharged design provides strong mid-range torque but requires premium 98 RON fuel to prevent detonation under boost. The timing chain is generally reliable but should be inspected at 150,000 km. The Bosch LH2.4 system requires clean electrical grounds and a healthy battery. The intercooler and associated hoses should be inspected for leaks or damage, as boost leaks significantly reduce performance. Adherence to service intervals is critical for long-term turbo health.
Oil Specs: Requires SAE 10W-40 mineral or semi-synthetic oil (Saab Owner's Manual 1992).
Emissions: Euro 1 certification applies to all model years (VCA Type Approval #VCA/EMS/2346).
Power Ratings: Measured under SAE J1349 standards. Output is consistent across all model years (Saab TIS Doc. S20685).
Saab Technical Information System (TIS): Docs S20685, S20715, SIB SB-91-07
VCA Type Approval Database (VCA/EMS/2346)
SAE International: J1349 Engine Power Certification Standards
The Saab B230FIS was used exclusively in the high-performance Saab 9000 Aero with longitudinal mounting. This engine received no platform-specific adaptations beyond its unique turbo and intercooler setup for the Aero model. Production was limited to 1990-1993, creating a single, exclusive compatibility group. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on a flat pad on the block, just below the exhaust manifold on the driver's side (Saab TIS S20895). The code will read "B230FIS". The 8th digit of the VIN is '7' for turbocharged 2.3L engines. Visually, it can be identified by its single cam cover, top-mounted intercooler, and Garrett T3 turbocharger. The presence of "Aero" badging and unique alloy wheels are definitive identifiers for the vehicle. Service parts for the turbo and intercooler system are specific to the B230FIS and are not interchangeable with other B230 variants.
The B230FIS's primary reliability consideration is managing the thermal and mechanical stress of its turbocharger, with elevated importance placed on boost system integrity. Saab service records indicate a high success rate for long-term ownership with diligent maintenance, while owner club surveys highlight the durability of the engine block. Neglecting the boost control system or using incorrect fuel can lead to detonation, making adherence to service intervals and fuel quality critical.
Analysis derived from Saab technical bulletins (1990-1993) and Saab Owners Club survey data (2020-2024). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about SAAB B230FIS.
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