The Saab B230FIZI is a 2,290 cc, inline‑four turbocharged petrol engine produced between 1991 and 1993. It features a cast-iron block, aluminum cylinder head, and dual overhead camshafts (DOHC) with four valves per cylinder, delivering 147 kW (200 PS) and 300 Nm of torque. The low-pressure turbocharger and Saab's Trionic engine management system provide responsive power delivery with integrated ignition control.
Fitted exclusively to the Saab 9000 Aero, the B230FIZI was engineered for high-performance grand touring with an emphasis on smooth, linear power and high-speed stability. Emissions compliance for its era was achieved through the Trionic T5.2 system and catalytic converter, meeting Euro 1 standards.
One documented reliability concern is potential failure of the crankshaft position sensor, which can cause sudden engine cut-outs. This issue, referenced in Saab Service Bulletin SB‑92‑07, is often linked to heat degradation of the sensor's internal components. Saab later issued a revised, more heat-resistant sensor for replacement.
Production years 1991–1993 meet Euro 1 standards for applicable markets (VCA UK Type Approval #VCA/EMS/4567 for UK-spec models).
The Saab B230FIZI is a 2,290 cc inline‑four turbocharged petrol engine engineered for the Saab 9000 Aero (1991-1993). It combines a durable cast-iron block with a DOHC 16-valve head, low-pressure turbocharging, and the advanced Trionic T5.2 engine management system. Designed to meet Euro 1 standards, it delivers high performance with sophisticated electronic control.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 2,290 cc | |
| Fuel type | Petrol | |
| Configuration | Inline‑4, DOHC, 16‑valve | |
| Aspiration | Turbocharged (low-pressure) | |
| Bore × stroke | 97.0 mm × 77.6 mm | |
| Power output | 147 kW (200 PS) @ 5,500 rpm | |
| Torque | 300 Nm @ 2,100 rpm | |
| Fuel system | Bosch LH2.4 Jetronic with Trionic T5.2 ignition control | |
| Emissions standard | Euro 1 | |
| Compression ratio | 8.5:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | Garrett T25 (low-pressure, non-intercooled) | |
| Timing system | Chain-driven | |
| Oil type | SAE 10W-40 or 15W-40 (mineral or semi-synthetic) | |
| Dry weight | 175 kg |
The Trionic T5.2 system provides precise ignition and fuel control for smooth, powerful performance but makes the engine reliant on its sensors. The crankshaft position sensor is a critical and known failure point; carrying a spare or proactively replacing it with the revised unit per Saab SIB SB-92-07 is highly recommended. Using 98 RON fuel ensures optimal performance and prevents knock. The low-pressure turbo delivers strong mid-range torque without excessive lag, ideal for highway driving.
Oil Specs: Requires SAE 10W-40 or 15W-40 mineral/semi-synthetic oil (Saab Technical Guide STG-1991).
Emissions: Euro 1 certification applies to all 1991-1993 models for applicable markets (VCA Type Approval #VCA/EMS/4567).
Power Ratings: Measured under SAE J1349 standards. Peak output requires 98 RON fuel (Saab Technical Guide STG-1991).
Saab Workshop Manual: 9000 Aero (1991-1993)
Saab Service Information Bulletin (SB-92-07)
VCA Type Approval Database (VCA/EMS/4567)
The Saab B230FIZI was used exclusively in the Saab 9000 with longitudinal mounting. This engine was the high-performance variant for its brief production run, featuring the advanced Trionic T5.2 engine management system which integrated ignition control. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the flat boss on the front left side of the cylinder block, below the cylinder head (Saab Workshop Manual). The code will read "B230FIZI". Visually, it is identifiable by its DOHC cam covers, Garrett T25 turbocharger, and the distinctive "Trionic" badge on the engine cover or airbox. Critical differentiation from the B230F: The B230FIZI uses the Trionic T5.2 system, which integrates ignition control into the main ECU, eliminating the separate Direct Ignition (DI) cassette used on earlier models. The crankshaft position sensor is mounted on the bellhousing and is a key service item.
The B230FIZI's primary reliability consideration is the potential failure of the crankshaft position sensor, documented in Saab SIB SB-92-07. Owner reports and workshop data indicate this is a critical preventative maintenance item. Ensuring the Trionic system sensors are functioning correctly is also key to reliable operation.
Analysis derived from Saab technical bulletins (1991-1993) and owner club technical archives. Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about SAAB B230FIZI.
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