Audi’s 2.7 liter Twin Turbo Engine is used in the following vehicles:

• A6 (C5)
• Allroad (C5)
• S4 (B5)

Brief Technical Description

2.7 liter, 250 hp, V6 DOHC bi-tubo engine with direct ignition, electronic turbo boost regulation and 5 valves per cylinder, ME 7.0 Motronic with electronic throttle control.

• Fuel & Ignition System
• Intake
• Electronics & ECU
• Oil
• Timing
• Audi S4 (B5) turbo Documentation

• 2.7 Liters
• 6 Cylenders
• 5 Valves per Liter
• Bore: 3.19 in. (81 mm)
• Stroke: 3.40 in. (86.4 mm)
• Displacement: 163 cu. in. (2671 cc)
• Compression Ratio: 9.3:1
• Horsepower (SAE Net): 250 @ 5800 RPM
• Torque: 258 ft. lbs.@ 1850 RPM
• Cylinder block: Cast Iron
• Crankshaft: Forged Steel, 4 main bearings
• Cylinder head: Aluminum alloy
• Valve Train: DOHC, belt driven, hydraulic lifters / variable intake valve timing and variable geometry composite intake manifold
• Firing Order: 1-4-3-6-2-5
• Cooling System: Water-cooled, thermostatically controlled radiator fan

Engine Code AGB

• Usage: 1997-2003 Audi S4

Engine Code APB

• Usage: 1998-2001 Audi S4

Engine Code AZB

• Usage: 2000-2001 Audi S4

• Throttle Body Boot
• F Hose
• Leaky Cooland Overflow
• Diverter Valve x 2
• Detailed List opf Common Problems

• Oil
  • Change Every 5,000mi
  • Use 0w40 (Many people use 5w30 also depending on time of year)
• Timing Belt
  • 100k Dealer Recommended
  • 75k Performance Community Recommended (When modded)

• ECU
• Engine Internals
• Exhaust Upgrade
• Fuel & Ignition
• Audi 2.7T Turbo Upgrade