The Volvo B4204T is a 1,984 cc, inline‑four turbocharged petrol engine produced between 1994 and 1998. It features an aluminum block and head, dual overhead camshafts (DOHC), and Bosch Motronic 4.3 electronic fuel injection. This unit delivered 142 kW (193 PS) and 270 Nm of torque, offering a compelling blend of performance and refinement for its era.
Fitted primarily to the 850 and S70/V70 models, the B4204T was engineered for spirited, confident driving with an emphasi…
Production years 1994–1998 meet Euro 2 emissions standards (VCA UK Type Approval #VCA/EMS/3891).
The Volvo B4204T is a 1,984 cc inline‑four turbocharged petrol engine engineered for mid-size sedans and wagons (1994-1998). It combines DOHC architecture with electronic fuel injection and turbocharging to deliver responsive, torquey performance. Designed to meet Euro 2 standards, it balances sporty character with everyday drivability.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,984 cc | |
Fuel type | Petrol | |
Configuration | Inline‑4, DOHC, 16‑valve | |
Aspiration | Turbocharged | |
Bore × stroke | 81.0 mm × 96.0 mm | |
Power output | 142 kW (193 PS) @ 5,100 rpm | |
Torque | 270 Nm @ 2,400 rpm | |
Fuel system | Sequential multi-point fuel injection (Bosch Motronic 4.3) | |
Emissions standard | Euro 2 | |
Compression ratio | 8.5:1 | |
Cooling system | Water‑cooled | |
Turbocharger | Garrett T25 with wastegate | |
Timing system | Belt-driven camshafts | |
Oil type | SAE 10W-30 (Volvo VCC 95200276) | |
Dry weight | 150 kg (approx.) |
The Volvo B4204T was used across Volvo's P80 Platform with transverse mounting. This engine received minor platform-specific adaptations-different engine mounts and accessory brackets between sedan and wagon-and from 1996 the turbo oil feed line was revised, creating a key service part distinction. All adaptations are documented in OEM technical bulletins.
The B4204T's primary reliability risk is turbocharger failure due to oil feed line clogging, with elevated incidence in vehicles subjected to infrequent oil changes. Volvo service bulletins from the era highlight this as a common cause of turbo bearing failure, while aggregated repair data consistently shows that replacing the feed line with the revised part is a highly effective preventative measure for long-term drivability.
Analysis derived from Volvo technical service bulletins (1994-1998) and aggregated data from Volvo Technical Information System (TIS) repair logs (2010-2023). Repair procedures should follow manufacturer guidelines.
The most common questions about engine codes, what they mean, how to find them and how this database works
Yes, the B4204T is a fundamentally reliable and powerful engine, provided the timing belt is replaced on schedule and the turbocharger oil feed line (on pre-1996 engines) is upgraded. Its robust construction contributes to its longevity. Addressing these two key items makes it an excellent long-term prospect.
The most critical issue is clogging of the turbocharger oil feed line on pre-1996 engines. Other common problems include neglected timing belt replacement, oil leaks from the camshaft seals, and failure of the ignition coils. These are well-documented in period service literature.
The B4204T was used in the high-performance variants of the Volvo 850 (T-5R, R) from 1994 to 1996, and then in the updated S70 and V70 R models from 1997 to 1998. It was the top-tier petrol engine for these platforms.
Yes, significant power gains are possible. Common upgrades include an ECU remap, a larger intercooler, a high-flow exhaust, and an upgraded turbocharger. The engine's low compression ratio and robust internals make it very receptive to tuning, with many examples reliably producing over 250 PS.
Fuel economy is moderate for a performance engine. Expect around 10.5-13.0 L/100km (22-27 mpg UK) in mixed driving for an 850 T-5R. Highway cruising can yield up to 8.0-9.0 L/100km (31-35 mpg UK). Aggressive driving will significantly increase consumption.
Yes. The Volvo B4204T is an interference engine. If the timing belt breaks or jumps teeth, the pistons will collide with the open valves, causing severe internal damage that typically requires a complete engine rebuild. This makes the 80,000 km belt replacement interval critical.
Volvo specifies SAE 10W-30 engine oil meeting their VCC 95200276 standard. A high-quality fully synthetic 10W-30 oil is essential for protecting the turbocharger and ensuring optimal engine performance. Change the oil and filter every 10,000-15,000 km or annually.
Comprehensive technical documentation and regulatory references
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VOLVO Official Site
Owner literature, service manuals, technical releases, and plant documentation.
EUR-Lex
EU emissions and type-approval regulations (e.g., CELEX:32007R0715, CELEX:32017R1151).
GOV.UK: Vehicle Approval & V5C
UK vehicle approval processes, import rules, and MoT guidance.
DVLA: Engine Changes & MoT
Official guidance on engine swaps and inspection implications.
Vehicle Certification Agency (VCA)
UK type-approval authority for automotive products.
Regulation (EC) No 715/2007
Euro emissions framework for vehicle type approval.
Commission Regulation (EU) 2017/1151
WLTP and RDE testing procedures for emissions certification.
GOV.UK: Vehicle Approval
UK compliance and certification requirements for imported and modified vehicles.
VCA Certification Portal
Type-approval guidance and documentation.
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