The Volvo B4194T2 is a 1,948 cc, inline‑four turbocharged petrol engine produced between 1998 and 2004. It features a cast iron block, aluminum head, and dual overhead camshafts (DOHC) driven by a timing belt. This performance-oriented engine was engineered for Volvo's compact executive models, balancing strong mid-range torque with refined power delivery.
Fitted primarily to the Volvo S40 and V40 (first generation) T4 models, the B4194T2 was designed for spirited acceleration and responsive overtaking, leveraging a low-pressure turbocharger for minimal lag. Emissions compliance was managed through Bosch Motronic 4.4 electronic fuel injection and catalytic converters, meeting Euro 3 standards for its production era.
One documented service consideration is the susceptibility of the turbocharger's oil feed line to internal coking and restriction, potentially leading to premature bearing failure, as noted in Volvo Service Bulletin #SB-98-31. The engine was eventually superseded by the more powerful B4204T3 variant.
Production years 1998–2004 meet Euro 3 emissions standards (VCA UK Type Approval applicable for registered imports).
The Volvo B4194T2 is a 1,948 cc inline‑four turbocharged petrol engine engineered for compact performance sedans and wagons (1998-2004). It combines a dual overhead camshaft design with a low-inertia turbocharger and Bosch Motronic fuel injection to deliver responsive, linear power. Designed to meet Euro 3 emissions standards, it prioritizes driver engagement and everyday usability.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,948 cc | |
| Fuel type | Petrol | |
| Configuration | Inline‑4, DOHC, 16‑valve | |
| Aspiration | Turbocharged | |
| Bore × stroke | 83.0 mm × 90.0 mm | |
| Power output | 125 kW (170 PS) | |
| Torque | 240 Nm @ 2,100 rpm | |
| Fuel system | Bosch Motronic 4.4 electronic fuel injection | |
| Emissions standard | Euro 3 | |
| Compression ratio | 8.5:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | Mitsubishi TD04-13T (low-pressure) | |
| Timing system | Toothed belt (interference design) | |
| Oil type | SAE 5W-30 (Semi-Synthetic) | |
| Dry weight | 135 kg |
The low-inertia turbo provides strong, lag-free mid-range torque ideal for overtaking but requires a 60-second idle cooldown after hard driving to prevent oil coking in the turbo bearings. SAE 5W-30 semi-synthetic oil is critical for its high-temperature stability. The 8.5:1 compression ratio allows safe operation on premium unleaded fuel. Strict 100,000 km timing belt replacement is mandatory to prevent catastrophic failure. The oil feed line to the turbo is a known failure point and should be inspected or replaced preventatively.
Oil Specs: Requires SAE 5W-30 specification (Volvo Owner's Manual 1999). Modern synthetics meeting ACEA A3/B3 are suitable and recommended.
Emissions: Certified to Euro 3 standards for all production years (1998-2004) (VCA UK Type Approval applicable for registered imports).
Power Ratings: Measured under SAE net horsepower standards (post-1972). Output is specific to the B4194T2 variant (Volvo Workshop Manual 1998).
Volvo Workshop Manual (1998 Edition)
Volvo Owner's Manual (1999)
Volvo EPC Archive: Doc. VEP-4194T2-98
Volvo Service Bulletin #SB-98-31
The Volvo B4194T2 was used across Volvo's S40/V40 T4 platform with transverse mounting. This engine received specific ECU and turbocharger tuning for the T4 performance variant, creating distinct power characteristics. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the flat pad atop the block, near the gearbox flange on the firewall side (Volvo Workshop Manual 1998). The casting number for the B4194T2 block is 'B4194'. Visual identification: Features a DOHC valve cover, Bosch Motronic ECU, a prominent Mitsubishi TD04 turbocharger on the exhaust manifold, and a "T4" badge on the rear of the vehicle. Differentiate from the naturally aspirated B4194S by the presence of the turbocharger and associated plumbing.
The B4194T2's primary reliability risk is premature turbocharger failure due to restricted oil flow from a coked oil feed line. Volvo service data from the late 1990s indicates this was a frequent cause of warranty claims, particularly in vehicles used for spirited driving without adhering to cooldown procedures. Strict adherence to operating procedures and preventative maintenance is critical.
Analysis derived from Volvo technical bulletins (1998-2004) and workshop manuals (1998-2003). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about VOLVO B-4194-T2.
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DVLA: Engine Changes & MoT
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Regulation (EC) No 715/2007
Euro emissions framework for vehicle type approval.
Commission Regulation (EU) 2017/1151
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