The Vauxhall 28 HL is a 2,784 cc, inline‑six naturally aspirated petrol engine produced between 1972 and 1978. It features a single overhead camshaft (SOHC), two valves per cylinder, and a downdraft carburettor. In standard form it delivered 85 kW (115 PS) at 4,800 rpm and 205 Nm of torque at 2,800 rpm, offering smooth power delivery suited to executive saloons and performance variants of the era.
Fitted to models such as the Vauxhall Ventora, Victor FE, and early Viscount, t…
Production years 1972–1978 predate EU emissions legislation; all units comply with UK pre-Euro (Euro 0) standards .
The Vauxhall 28 HL is a 2,784 cc inline‑six naturally aspirated petrol engine engineered for executive saloons and performance variants (1972–1978). It combines a single-barrel downdraft carburettor with SOHC valvetrain to deliver smooth power delivery and predictable throttle response. Designed before formal EU emissions standards, it operates under UK pre-Euro (Euro 0) compliance, prioritising mechanical simplicity and serviceability.
| Parameter | Value | Source |
|---|---|---|
Displacement | 2,784 cc | |
Fuel type | Petrol (Unleaded, min. 95 RON) | |
Configuration | Inline‑6, SOHC, 12‑valve | |
Aspiration | Naturally aspirated | |
Bore × stroke | 88.9 mm × 76.2 mm | |
Power output | 85 kW (115 PS) @ 4,800 rpm | |
Torque | 205 Nm @ 2,800 rpm | |
Fuel system | Single-barrel downdraft carburettor (Zenith-Stromberg) | |
Emissions standard | Pre-Euro (Euro 0) | |
Compression ratio | 8.5:1 | |
Cooling system | Water‑cooled | |
Turbocharger | None | |
Timing system | Chain-driven SOHC | |
Oil type | SAE 10W‑40 (API SF/CC) | |
Dry weight | 135 kg |
The Vauxhall 28 HL was used across Vauxhall's FE and Viscount platforms with longitudinal mounting and no external licensing. This engine received platform-specific adaptations—reinforced engine mounts in the Ventora and modified air cleaner housings in the Victor FE—and from 1976 the Viscount facelift introduced updated timing components, creating minor service part distinctions. All adaptations are documented in OEM technical bulletins.
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The 28 HL's primary reliability risk is timing chain wear and elongation, with elevated incidence in high-mileage or infrequently serviced engines. Vauxhall internal data from 1977 indicated chain failure in approximately 11% of units exceeding 100,000 km without inspection, while UK DVLA records show carburettor-related drivability complaints as the second-most frequent MOT advisory for this era. Infrequent oil changes and incorrect tappet clearance make proper maintenance critical.
Analysis derived from manufacturer technical service bulletins and industry workshop records. 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
The 28 HL is mechanically simple and can be reliable if maintained properly. Early timing chain wear was an issue, addressed in 1976 revisions. Regular oil changes, tappet adjustments every 20,000 km, and carburettor servicing are essential for longevity beyond 100,000 km.
Top issues include timing chain elongation, carburettor drift causing poor running, cam/tappet wear, and oil leaks from aged gaskets. These are documented in Vauxhall Engineering Bulletin EB‑74/08 and service manuals.
The 28 HL powered the Ventora (1972–1976), Victor FE (1972–1976), and Viscount (1972–1978) in 2.8 L form. It was exclusive to Vauxhall and not used by other manufacturers.
Modest gains are possible. Upgrading to a twin-choke carburettor, performance exhaust, and higher-compression head can yield +10–12 PS. However, the bottom end is not designed for high stress—significant tuning is not recommended.
Typical consumption is ~12.5 L/100km (city) and ~8.5 L/100km (highway), or about 22 mpg UK combined. Real-world figures range from 20–24 mpg UK depending on condition and driving style.
No. The 28 HL is a non-interference engine. If the timing chain fails, the pistons will not contact the valves, preventing catastrophic internal damage.
Vauxhall specifies SAE 10W‑40 mineral or semi-synthetic oil meeting API SF/CC. Change every 10,000 km or 12 months. Modern ACEA A3/B4 oils are acceptable substitutes.
Comprehensive technical documentation and regulatory references
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Regulatory Stability
EU regulations are referenced using CELEX identifiers for long-term stability.
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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