The larger-displacement diesel V8 engine configuration has also been used in various Scania commercial vehicles; such as in trucks, buses, and marine (boat) applications.

They all use multi-valve technology, with the valves being operated by two overhead camshafts per cylinder bank (sometimes referred to as 'quad cam').

Based on the existing 4.2 V8 from the Audi C5 S6, this engine was tuned with the assistance of VW Group subsidiary Cosworth Technology (now MAHLE Powertrain), and featured two parallel turbochargers, known as 'biturbo', with two side-mounted intercoolers (SMICs).

They all use multi-valve technology, with the valves being operated by two overhead camshafts per cylinder bank (sometimes referred to as 'quad cam').

This allows the turbocharger(s) to produce boost pressure more quickly as the path the exhaust gases travel is much reduced.

[29] This Audi engine is an entirely redeveloped and bored-out evolution of the superseded 4.0 V8 TDI CR, now with 90 mm (3.54 in) cylinder spacing between bore centres, and again with roller chain drive for the overhead camshafts and ancillaries.

[34][35][36][37][38][39] Audi developed a Group A competition version of the Audi V8 engine for entry into the Deutsche Tourenwagen Meisterschaft (DTM) (German Touring Car Championship) auto racing series equipped with a 309 kW (420 PS; 414 bhp), later 340 kW (462 PS; 456 bhp), 3.6 V8 engine and 6-speed manual transmission, and began racing with it in 1990 with Schmidt MotorSport (SMS) running the operation, and Hans-Joachim Stuck, Walter Röhrl and Frank Jelinski driving.

[40][41][42] The R8C and R8R both use 3.6-liter, twin-turbocharged V8 engines, producing between 600–640 hp (447–477 kW), and between 516–561 lb⋅ft (700–761 N⋅m) of torque, while using two 32.4 mm (1.28 in) air restrictors, and pushing 1.67 bar (24.2 psi) of absolute boost pressure.

The engine from the Audi R8, a 3.6-liter V8, with (Honeywell Turbo Technologies) turbocharger,[48] was used as the initial powerplant for the Bentley in 2001.

It produced 637 hp (475 kW) and over 479 lb⋅ft (649 N⋅m) of torque, via two 33.1 mm (1.30 in) intake restrictor, with boost pressure limited to 1.87 bar (27.1 psi) by regulations.

This saw the engine expand to 4.0 liters, producing between 600–650 hp (450–480 kW), and 590 lb⋅ft (800 N⋅m) of torque, using two 30.7 mm (1.21 in) intake restrictor plates, with boost pressure still being limited to 1.87 bar (27.1 psi) by regulations.

Without the intake restrictor plates (completely unrestricted), and with boost pressure set at around 1.9 bar (28 psi), the 4.0-liter engine is reportedly capable of producing up to 860 hp (640 kW), and about 750 lb⋅ft (1,020 N⋅m) of torque.

Audi developed a Group A competition version of the Audi V8 engine for entry into the Deutsche Tourenwagen Meisterschaft (DTM) (German Touring Car Championship) auto racing series equipped with a 309 kW (420 PS; 414 bhp), later 340 kW (462 PS; 456 bhp), 3.6 V8 engine and 6-speed manual transmission, and began racing with it in 1990 with Schmidt MotorSport (SMS) running the operation, and Hans-Joachim Stuck, Walter Röhrl and Frank Jelinski driving.

[40][41][60] The Audi TT-R DTM uses a 4.0 L (244 cu in) Audi naturally-aspirated V8 engine in partnership with Neil Brown Engineering for development, building, assembly, maintenance and tune-up role, it has a power output of approximately 455 hp (339 kW; 461 PS) @ 6,800 rpm and a maximum torque of about 510 N⋅m (376 lbf⋅ft) @ 6,000 rpm, while using two 28 mm (1.1 in) air intake restrictors.

[61] The Audi A4 DTM is powered by a 4.0 L (244 cu in) Audi naturally-aspirated V8 engine in partnership with Neil Brown Engineering for development, building, assembly, maintenance and tune-up role, it has a power output of approximately 460 hp (343 kW; 466 PS) and a maximum torque of more than 500 N⋅m (369 lbf⋅ft).