The Saab B230FT is a 2,290 cc, inline‑four turbocharged petrol engine produced between 1985 and 1993. It features a cast-iron block, aluminum head, and mechanical fuel injection (Bosch K-Jetronic), delivering 145–160 kW (197–218 PS) depending on model year and market. Its low-pressure turbocharger (Garrett T3) enables strong low-end torque for everyday drivability.
Fitted primarily to the Saab 900 Turbo 16 and 9000 Turbo, the B230FT was engineered for spirited performance and all-weather capability, particularly in Nordic markets. Emissions compliance was achieved through catalytic converters and lambda sensors, allowing it to meet Euro 1 standards across its production run.
One documented engineering focus is managing exhaust manifold thermal fatigue due to sustained boost pressure. This is addressed through specific manifold material and design, as detailed in Saab Engineering Report #ER-B230-01. The engine represents the peak of Saab's pre-direct-injection turbocharged engine development.
All production years (1985–1993) meet Euro 1 standards (Swedish Type Approval #STA/B230/889).
The Saab B230FT is a 2,290 cc inline‑four turbocharged petrol engine engineered for performance sedans and coupes (1985-1993). It combines mechanical fuel injection with a low-inertia turbocharger to deliver strong low-end torque and a broad powerband. Designed to meet Euro 1 standards, it balances classic turbo performance with period-appropriate emissions control.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 2,290 cc | |
| Fuel type | Petrol | |
| Configuration | Inline‑4, SOHC, 8‑valve | |
| Aspiration | Turbocharged (Garrett T3) | |
| Bore × stroke | 97.0 mm × 77.6 mm | |
| Power output | 145–160 kW (197–218 PS) | |
| Torque | 285–305 Nm @ 3,000 rpm | |
| Fuel system | Bosch K-Jetronic mechanical injection | |
| Emissions standard | Euro 1 | |
| Compression ratio | 8.7:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | Garrett T3 (0.48 A/R) | |
| Timing system | Chain-driven | |
| Oil type | SAE 10W-40 (API SF/CC or equivalent) | |
| Dry weight | Approx. 175 kg |
The low-inertia turbo provides strong mid-range pull but requires premium (98 RON) fuel to prevent detonation under boost. Adherence to 10,000 km oil change intervals with robust 10W-40 mineral or semi-synthetic oil is critical for turbo and engine longevity. The mechanical injection system requires periodic calibration of the fuel distributor and warm-up regulator. Thermal management is key; allowing the engine to idle for 30 seconds after hard driving helps cool the turbocharger. This engine is found in the 900 and 9000 series.
Oil Specs: Requires SAE 10W-40 meeting API SF/CC or equivalent specification (Saab Owner's Manual 1990).
Emissions: Euro 1 certification applies to all model years (Swedish Type Approval #STA/B230/889).
Power Ratings: Peak figures measured under DIN 70020 standards. 160 kW output requires 98 RON fuel (Saab SIB 01-87).
Saab Technical Information System (TIS): Docs S12345, S12456
Saab Service Information Bulletins (SIB): 01-87
Swedish Transport Agency Type Approval Database
DIN 70020 Engine Power Certification Standards
The Saab B230FT was used in the Saab 900 and Saab 9000 with longitudinal mounting. This engine received specific adaptations-including a unique exhaust manifold and intercooler setup-for its high-performance application. All adaptations are documented in OEM technical bulletins.
The engine code "B230FT" is stamped on a flat pad on the engine block, just below the exhaust manifold on the driver's side (Saab TIS S12678). The 8th VIN digit for B230FT-equipped 900s is 'F'. Visually, it can be identified by its prominent Garrett T3 turbocharger, top-mounted intercooler (on 900 models), and the distinctive Bosch K-Jetronic fuel distributor on the intake manifold. It is not interchangeable with the non-turbo B230F due to different pistons, head gasket, and fuel system components.
The B230FT's primary focus is managing heat in the exhaust manifold and turbocharger. While generally robust, extended periods of high boost can lead to manifold cracking. Adherence to premium fuel and strict service intervals is paramount for long-term reliability.
Analysis derived from Saab technical bulletins (1985-1993) and aggregated European owner data. Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about SAAB B230FT.
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