Audi R8 42 Complete Engine BYH 4.2 FSI V8 Quattro 420HP 79 000 miles, WARRANTY

Warranty and technical condition of the part

The engine is sold with a 90-day warranty.

The warranty covers the engine itself; engine accessories are covered by a 30-day warranty.

The power unit was tested before removal and is in full working order.

Listing details

The offer applies to a complete engine.

The engine comes from a right-hand drive (RHD) vehicle. The wiring harness is not compatible with left-hand drive (LHD) vehicles and requires replacement or modification.

Audi R8 42 Complete Engine BYH 4.2 FSI V8 Quattro 420HP is a complete powertrain unit from the FSI family, designed for the first-generation Audi R8 sports model. The V8 engine with direct gasoline injection ensures characteristic high-revving operation and solid performance, ideal for dynamic driving with the quattro system.

Specifications and technical data

• SKU: 079100031J-1
• Mark: Audi
• Condition: Used
• OEM Part Number: 079100031J
• Substitutable numbers: 079100031J, 079 100 031 J, 079100031JX, 079 100 031 JX
• Fuel type: Petrol
• Number of cylinders: 8
• Part type: Complete Assembly
• Category: Engines
• Engine code: BYH
• Mileage: 79 000

Technical Characteristics of the BYH 4.2 FSI V8 Engine

The BYH 4.2 FSI V8 unit belongs to Audi's naturally aspirated gasoline engines with direct fuel injection. The V8 configuration ensures smooth, refined operation and quick revving, translating into sporty throttle response and stable power delivery across the entire RPM range.

The engine runs on gasoline, which, combined with FSI technology, allows for precise mixture dosing and efficient power utilization. The performance of this unit is tailored to the character of the Audi R8 – providing a significant power reserve both on the road and on the track.

Construction and Cylinder Layout

The BYH engine is a classic V8 with a compact design, engineered for central mounting in the Audi R8. The V-shaped cylinder layout contributes to the unit's compact dimensions, facilitating integration with the quattro drivetrain and sports suspension.

• Eight cylinders ensure smooth, even operation and the characteristic V8 sound.
• High-revving characteristics are conducive to dynamic driving and precise power modulation.
• Direct FSI injection improves combustion efficiency and response to load.

This configuration ensures that the unit works well with the all-wheel-drive system, providing predictable vehicle behavior at high speeds.

Application and Fitment for Audi R8

The Audi R8 42 Complete Engine BYH 4.2 FSI V8 Quattro 420HP was specifically designed for the first-generation Audi R8 with quattro drive. The unit's construction, ancillaries, and mounting points are adapted to the factory engine bay architecture, simplifying installation in place of the original unit.

The engine is intended for users who expect:

• preservation of the factory driving characteristics and performance of the Audi R8,
• compatibility with the quattro drivetrain and the vehicle's factory electronics,
• a complete powertrain unit as a basis for a professional engine replacement.

Condition, Mileage, and Benefits of Purchasing a Used Engine

The offered unit falls into the category of used engines, presenting an attractive cost-effective solution compared to brand-new components. The declared mileage allows for an assessment of its operational wear and planning of potential service activities before installation in the vehicle.

Choosing a complete, used V8 FSI engine for the Audi R8 is a good solution when:

• the original engine has suffered a major failure and repair is not cost-effective,
• a comprehensive restoration or rebuild after a collision is planned,
• maintaining the original engine specification for the R8 model is a priority.

What to Consider When Replacing an Engine in a Sports Car

When installing such an advanced unit as the BYH 4.2 FSI V8, it is advisable to use a professional service experienced with the Audi R8. It is crucial to check the lubrication and cooling systems and ensure proper integration with the vehicle's electronics. It is also good practice to verify the condition of the ancillaries and perform basic maintenance before the first start-up after installation.

If you are interested in a broader context of engine failures in premium cars, an article describing problematic engines in another popular model might be helpful – you can find it here: BMW E90 problematic engines – a practical guide to troublesome units.

Other Audi Engines in Our Offer

If you are also looking for other Audi engines for service or restoration projects, check out the dedicated category in our store. You can find a full list of available units here: Audi engines.