The Vauxhall A16 LES is a 1,598 cc, inline‑four naturally aspirated petrol engine produced between 1991 and 1998. It features a single overhead camshaft (SOHC), 8‑valve configuration with multi‑point fuel injection (MPFI), delivering 74 kW (101 PS) and 138 Nm of torque. The engine’s cast‑iron block and aluminium head provide durability with straightforward serviceability for everyday driving.
Fitted to models such as the Astra F (Mark 3) and Corsa B, including the GSi…
Production years 1991–1998 meet Euro 1 standards .
The Vauxhall A16 LES is a 1,598 cc inline‑four naturally aspirated petrol engine engineered for compact hatchbacks and sedans (1991–1998). It combines multi‑point fuel injection with a single overhead camshaft to deliver responsive low‑to‑mid range performance and straightforward maintenance. Designed to meet Euro 1 emissions standards, it balances drivability with mechanical simplicity.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,598 cc | |
Fuel type | Petrol (Unleaded) | |
Configuration | Inline‑4, SOHC, 8‑valve | |
Aspiration | Naturally aspirated | |
Bore × stroke | 77.8 mm × 83.6 mm | |
Power output | 74 kW (101 PS) @ 5,800 rpm | |
Torque | 138 Nm @ 3,200 rpm | |
Fuel system | Bosch MPFI (Multi‑Point Fuel Injection) | |
Emissions standard | Euro 1 | |
Compression ratio | 9.4:1 | |
Cooling system | Water‑cooled | |
Turbocharger | None | |
Timing system | Chain‑driven camshaft | |
Oil type | Refer to vehicle handbook / manufacturer specification | |
Dry weight | 118 kg |
The Vauxhall A16 LES was used across Vauxhall's Astra F and Corsa B platforms with transverse mounting and no external licensing. This engine received platform-specific adaptations—revised engine mounts in the Astra GSi and modified intake manifolds in the Corsa Sport—and from 1995 the facelifted Astra F models adopted updated ECU calibrations for improved idle stability, creating minor interchange limits. All adaptations are documented in OEM technical bulletins.
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Field reports and technical service bulletins highlight component wear patterns under high-load operation. Adherence to manufacturer service intervals and approved fluid specifications is critical for long-term reliability.
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 A16 LES is mechanically simple and generally robust if cooling system maintenance is observed. Early models (1991–1994) are prone to head gasket issues, but post-1995 units with updated gaskets are more durable. Regular coolant changes and correct head bolt torque during servicing greatly improve longevity.
Head gasket failure (especially pre-1995), coolant leaks from plastic elbows, idle instability due to carbon buildup, and exhaust manifold cracks. These are documented in Vauxhall TSBs and widely observed in service records.
Primarily the Astra F (1991–1998) in 1.6i and GSi trims, and the Corsa B (1993–1998) in 1.6i and Sport variants. All are Euro 1-compliant and feature SOHC 8-valve architecture.
Modest gains are possible via intake/exhaust upgrades and ECU remapping (+10–15 kW), but the SOHC head limits airflow. Forced induction is not recommended due to low compression tolerance and head gasket risk. Most tuning focuses on drivability rather than peak power.
Typical consumption is ~8.5 L/100km (city) and ~5.8 L/100km (highway), or about 33 mpg UK combined in an Astra GSi. Real-world figures range 30–38 mpg (UK) depending on condition and driving style.
No. The A16 LES is a non-interference engine. If the timing chain fails, the pistons will not contact the valves, preventing catastrophic internal damage—though the engine will still stop running.
Vauxhall specifies 10W‑40 oil meeting API SG/CD or ACEA A2 standards. Modern ACEA A3/B4 10W‑40 oils are acceptable. Change every 10,000 km or annually to maintain valve train and chain longevity.
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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