Audi 4.2 FSI V8 Engine for Sale – Complete Engine Specifications, Compatibility and Fitment Guide

Looking for an Audi 4.2 FSI V8 engine for sale? The Audi 4.2-litre FSI V8 is a naturally aspirated petrol engine designed for selected Audi performance and luxury vehicles. Featuring Fuel Stratified Injection (FSI) direct fuel injection, eight cylinders and a high-revving configuration in certain applications, this engine delivers strong power and torque for drivers seeking a genuine replacement engine.

Whether you need a replacement engine for an Audi Q7, A8, S5, RS4, RS5 or another compatible model, finding the correct engine configuration is essential. Different versions of the Audi 4.2 FSI V8 use different engine codes, power outputs, intake systems, engine management components and installation configurations.

We offer the Audi 4.2 FSI V8 engine for buyers looking for a suitable replacement or engine assembly. Before purchasing, confirm the engine code, vehicle generation and compatibility requirements to ensure the correct fitment.

Audi 4.2 FSI V8 Engine Specifications

Specifications vary according to engine code, vehicle application, model year and market.

Compatibility / Fitment Notes

The Audi 4.2 FSI V8 engine was installed in several Audi models, including performance-oriented RS vehicles and selected luxury SUVs and sedans.

Potential vehicle applications include:

• Audi Q7 4.2 FSI: Selected first-generation Q7 models, commonly associated with the BAR engine code.

• Audi A8 4.2 FSI: Selected A8 D3 models, including applications using the BVJ engine code.

• Audi RS4 4.2 FSI: B7-generation RS4 models equipped with the high-revving BNS V8 engine.

• Audi S5 4.2 FSI: Selected first-generation S5 Coupe models equipped with the 354 HP V8 configuration.

• Audi R8 4.2 FSI: Selected first-generation R8 models using the BYH engine configuration.

• Audi RS5 4.2 FSI: Selected RS5 models featuring the 450 HP naturally aspirated V8.

• Audi RS4 4.2 FSI B8: Selected later RS4 applications with the 450 HP V8 configuration.

Important Engine Compatibility Information

Not every Audi 4.2-litre engine is interchangeable. Even when two engines share the same displacement and basic V8 architecture, differences in engine codes, cylinder heads, timing components, intake manifolds, wiring harnesses, ECU programming, oil systems and mounting arrangements can affect compatibility.

Before ordering, compare the original engine code with the replacement engine code. Also verify the transmission configuration, accessories, sensors, ECU requirements and vehicle-specific mounting points.

Engine Configuration

The Audi 4.2 FSI is an eight-cylinder, 90-degree V-engine developed for selected Audi vehicles. Its FSI technology uses direct petrol injection, delivering fuel directly into the combustion chambers rather than relying on conventional intake-port injection.

The engine features a DOHC configuration with four valves per cylinder in the standard FSI versions, variable valve timing and application-specific intake and engine management systems.

Certain performance versions, including the RS4 B7 engine, feature a high-revving design developed for performance applications.

Engine Displacement

The Audi 4.2 FSI V8 has an actual displacement of 4,163 cc (4.2 litres).

Its bore measures approximately 84.5 mm, while the stroke measures approximately 92.8 mm. Although these dimensions are shared across important versions, internal engine components and specifications can differ between applications.

Fuel Type

This engine operates on petrol (gasoline) and uses Audi's Fuel Stratified Injection (FSI) direct-injection technology.

Fuel requirements and recommended octane ratings should be checked against the specific engine version and vehicle manufacturer's specifications.

Aspiration / Induction

The Audi 4.2 FSI V8 is naturally aspirated. It does not use a factory turbocharger or supercharger in its standard Audi applications.

Its intake configuration varies depending on the vehicle and engine code, particularly between standard-output and high-performance versions.

Power Output and Torque

Power and torque depend on the specific engine application.

Typical factory configurations include:

• Audi Q7 4.2 FSI BAR: Approximately 350 HP and 440 Nm.

• Audi A8 4.2 FSI BVJ: Approximately 350 HP, with output and torque dependent on the application.

• Audi S5 4.2 FSI: Approximately 354 HP and 440 Nm.

• Audi RS4 B7 4.2 FSI BNS: Approximately 420 HP and 430 Nm.

• Audi RS5 4.2 FSI: Approximately 450 HP and 430 Nm.

These differences make engine-code verification particularly important when sourcing a replacement.

Years / Generation

The Audi 4.2 FSI V8 appeared in several Audi model generations, with major applications spanning approximately 2005 to 2015.

Examples include:

• Audi Q7 first generation (4L).

• Audi A8 D3 generation.

• Audi RS4 B7 generation.

• Audi S5 B8 generation.

• Audi R8 first generation.

• Audi RS5 8T generation.

• Audi RS4 B8 generation.

Production years can differ by market, body style and engine variant. Always verify the original vehicle's VIN and engine identification before purchasing.

Buy an Audi 4.2 FSI V8 Engine

If you are searching for an Audi 4.2 FSI V8 engine for sale, choosing the correct specification is just as important as finding the right engine condition.

Whether you are replacing a damaged engine or sourcing an engine assembly for a vehicle restoration, confirm the engine code and application before placing your order.

When requesting availability or a quotation, provide:

• Your Audi model and model year.

• Original engine code.

• Vehicle VIN, where available.

• Transmission type.

• Whether you require a complete engine assembly or a bare engine.

• Your delivery location.

This information helps identify a suitable engine configuration and reduces the risk of ordering an incompatible replacement.

Contact us today to enquire about the Audi 4.2 FSI V8 engine for sale, confirm availability and request a quotation for your vehicle.

The Audi 4.2 FSI V8 appeared in several Audi model generations, with major applications spanning approximately 2005 to 2015.

Examples include:

• Audi Q7 first generation (4L).

• Audi A8 D3 generation.

• Audi RS4 B7 generation.

• Audi S5 B8 generation.

• Audi R8 first generation.

• Audi RS5 8T generation.

• Audi RS4 B8 generation.

The Audi 4.2 FSI V8 engine was installed in several Audi models, including performance-oriented RS vehicles and selected luxury SUVs and sedans.

Potential vehicle applications include:

• Audi Q7 4.2 FSI: Selected first-generation Q7 models, commonly associated with the BAR engine code.

• Audi A8 4.2 FSI: Selected A8 D3 models, including applications using the BVJ engine code.

• Audi RS4 4.2 FSI: B7-generation RS4 models equipped with the high-revving BNS V8 engine.

• Audi S5 4.2 FSI: Selected first-generation S5 Coupe models equipped with the 354 HP V8 configuration.

• Audi R8 4.2 FSI: Selected first-generation R8 models using the BYH engine configuration.

• Audi RS5 4.2 FSI: Selected RS5 models featuring the 450 HP naturally aspirated V8.

• Audi RS4 4.2 FSI B8: Selected later RS4 applications with the 450 HP V8 configuration.