2.5 TFSI

-Identification:
parts code prefix/variant: 07K3; ID code: CEPA/CEPB
-Engine displacement & engine configuration:
2480 cm3 (151.3 cu in) inline 5 cylinder engine; bore x stroke: 82.5 by 92.8 mm (3.25 in × 3.65 in), stroke ratio: 0.89:1 - undersquare/long-stroke, 496.1 cc per cylinder; 88 mm (3.46 in) cylinder spacing, 144 degree firing interval, firing order: 1-2-4-5-3, compression ratio: 10.0:1
-Cylinder block & crankcase:
GJV-450 compacted vermicular graphite cast iron (GJV/CGI); six main bearings, two-part cast aluminium alloy horizontal-baffled oil sump, simplex roller chain-driven oil pump, die-forged steel crankshaft, forged steel connecting rods, cast aluminium alloy pistons (weight, each, including rings and gudgeon pin: 492 grams (17.4 oz))
-Cylinder head & valvetrain:
cast high hot-strength aluminium alloy, modified inlet duct geometry for high tumble values providing superior knock resistance, four valves per cylinder (exhaust valves sodium filled for increased cooling), 20 valves total, low-friction roller finger cam followers with automatic hydraulic valve clearance compensation, simplex roller chain-driven (relay method) light-weight double overhead camshafts (DOHC), variable valve timing with continuous adjusting intake and exhaust camshaft timing of up to 42 degrees from the crankshaft, two-stage 'valvelift' variable lift control for inlet valves, siamesed inlet ports, Audi "RS" 'red' plastic cam cover
-Aspiration:
twin charge pressure sensors; one pre-throttle plate, one intake manifold mounted, no air flow meter, cast alloy throttle body with electronically controlled 'drive by wire' throttle butterfly valve, two piece intake manifold with charge movement flaps adjusted by a continuous-action pilot motor, water-cooled turbocharger incorporated in exhaust manifold with 64 mm (2.5 in) diameter outlet, generating up to 1.2 bars (17.4 psi) boost, separated central lower front-mounted intercooler (FMIC)
-Fuel system:
fully demand-controlled and returnless: fuel tank-mounted low-pressure fuel lift pump; Fuel Stratified Injection (FSI): single-piston high-pressure injection pump supplying up to 122 bars (1,770 psi) fuel pressure in the stainless steel common rail fuel rail, five combustion chamber sited direct injection sequential solenoid-controlled fuel injectors, air-guided combustion process, multi-pulse injection with homogeneous mixing, stratified lean-burn operation with excess air at part load, ultra-low sulfur unleaded petrol (ULSP)
-Ignition system & engine management:
Beru longlife spark plugs centrally positioned in combustion chamber, mapped direct ignition with five individual direct-acting single spark coils; Bosch Motronic MED electronic engine control unit (ECU), cylinder-selective knock control via two knock sensors, permanent lambda control
-Exhaust system:
secondary air injection pump for direct injection into exhaust ports to assist cold start operation, cast iron exhaust manifold (with integrated turbocharger), two primary and two main high-flow sports catalytic converters, two heated oxygen sensors monitoring pre- and post-catalyst exhaust gasses, vacuum-operated map-controlled flap-valves mounted in rear exhaust silencer tail pipes
dimensions
length: 494 mm (19.4 in), mass: 185 kilograms (408 lb)
-DIN-rated motive power & torque output:
340 HP @ 5400 - 6500 rpm; 450 NM (332 lb-ft) @ 1600 - 5300 rpm; redline: 7100 rpm - RS3 & TTRS
310 HP @ 5400 - 6500 rpm; 465 NM (343 lb-ft) @ 1600 - 5300 rpm; redline: 7100 rpm - RS Q3
360 HP @ 5400 - 6500 rpm; 465 NM (343 lb-ft) @ 1600 - 5300 rpm; redline: 7100 rpm - TTRS plus
367 HP @ 5400 - 6500 rpm; 465 NM (343 lb-ft) @ 1600 - 5300 rpm; redline: 7100 rpm - RS3 2015 -
408 HP @ 5400 - 6500 rpm; 480 NM (354 lb-ft) @ 1600 - 5300 rpm; redline: 8000 rpm - Audi Quattro Concept