Audi’s five-cylinder engines of the 1980s were powerful, sporty engines that reinforced the brand’s “Vorsprung durch Technik” commitment.

These five-cylinder engines combined the efficiency of a four-cylinder with the power of a six-cylinder, resulting in lighter and more compact engine packages. A turbocharged version was a sensation.

Engine Code	CEPA
Engine type	Five-cylinder inline engine
Displacement	151.3 cu in (2480 cc)
Maximum power	335.2 hp (250 kW) @ 5400–6500 rpm
Maximum torque	331.9 lb ft (450 Nm) @ 1600–5300 rpm
Valves per cylinder	4 – Sodium Filled for cooling
Bore	3.24 in (82.5 mm)
Stroke	3.65 in (92.8 mm)
Compression ratio	10 : 1
Firing order	1-2-4-5-3
Fuel system	FSI (homogeneous) direct injection with demand-based high and low fuel pressure regulation Engine management without an air mass meter
Fuel grade	91 AKI
Engine weight	403.4 lb (183 kg)
Engine management	Bosch MED 9.1.2
Exhaust emission standard	LEV II
Emissions control	Sensors upstream and downstream of the catalytic converter

Cylinder Block
Because of its very short overall length, this engine lends itself very well to transverse mounting.

Material Selection
The cylinder block is made from high tensile strength cast iron. The strength of this material is needed because the connecting rod bearings and main bearings have relatively small widths. Piston cooling jets are mounted in the cylinder block.
Note
The liquid sealants using during engine assembly and repair are specifically designated for various components.
Oil Pan
The oil pan is constructed from two parts. The cast upper part acts as a baffle plate and is bolted to the crankcase. This upper part supports the oil pump, which is bolted to the cylinder block.
The lower part of the oil pan is made from sheet steel. It houses Oil Level Thermal Sensor G266 and the drain plug.
Both the front sealing flange and lower timing case cover are sealed against the cylinder block by a liquid sealant.

Crankshaft Drive
The forged steel crankshaft is supported by six main bearings.
A torsional vibration damper reduces radial vibration by the pistons and crankshaft. The damper, referred to as a viscodamper in repair
literature, uses a high viscosity silicone.

Audi TT RS 2.5 ltr TFSI Reciprocating component	Specifications
Center-to-center distance between cylinders	3.46 in (88 mm)
Block height	8.66 in (220 mm)
Connecting rod length	5.66 in (144 mm)
Crankshaft main bearings	6
Main bearing diameter	2.28 in (58 mm)
Connecting rod bearing diameter	188 in (47.8 mm)

Pistons and Connecting Rods
To better respond to high loads, the pistons are a “boxed” design. They have an asymmetrical skirt with beveled box walls on the thrust and counter-thrust sides. They are manufactured from a high heat resistant alloy and have cast in ring lands for the upper piston ring. Lower weight and low oil consumption characteristics were designed into these pistons.

Mini headland rings 451_027a
N2, taper-face piston ring
N1, asymmetrical, spherical,
steel nitride + PVD*
N3, DSF** ring with
tapered lands

*PVD = Physical Vapor Deposition is a coating process in which
the coating material is physically vapor-deposited (by kinetic
or impact energy) on a material in a vacuum environment.

• *Top-beveled oil control ring with coil expander
  Reinforced threads M9 bolt
  Optimized design with
  large cross section

The original Audi TT, named after the legendary “Tourist Trophy” race in the United Kingdom, was a milestone in automotive design.

The design followed pure geometry, with the central theme being a circle reflected in the wheel arches, roofline arches, and both the front and rear fascias of the vehicle.

The front of the TT RS features the Audi marque single frame grille. The insert is shiny black bounded with a matte aluminum finish. Large side air intakes with flared edges draw air into the engine compartment. The left intake routes air to the transmission, while the right intake routes air to an auxiliary radiator. The turbocharger draws in air through the upper section of the grille while the intercooler sits behind the lower segment of the grille.

The front valance has been designed as a splitter, and when coupled with the rear spoiler, provides perfect aerodynamic balance.

The Audi TT RS, developed by quattro GmbH,breathes new life into old traditions.

Thanks to a turbocharged 2.5-liter five cylinder engine,permanent all-wheel drive, and a sporty yet comfortable suspension and design, both the RS Coupe and RS Roadster are uncompromising sports cars.

The production of the Audi TT RS involves the use of two factories. The Audi Space Frame (ASF) body is constructed in Ingolstadt, Germany, while final assembly is completed in Györ, Hungary.

The TT RS is clearly the flagship of the TT model series. The muscular sheet metal body, tautly curved surfaces, and sharp lines give an impression of sculpture in motion. From the side, the 18-inch wheels, large brakes, and flared wheel openings of the TT RS instantly catch the eye. Matte aluminum door mirror covers are standard.

The headlight design is a distinguishing Audi characteristic. Xenon plus headlights, standard on the TT RS, are accentuated by daytime running lights comprised of 12 LEDs arranged in a straight line.

8J Audi TT RS Rear View
The rear bumper includes an integrated diffuser insert that surrounds two large, oval tailpipes.
A wide, stationary spoiler increases downforce on the rear axle, improving stability at high speeds. The automatic spoiler featured on the standard production TT is available on the TT RS as an option.

Audi TT RS Models Body Specifications	Coupe	Roadster
Curb weight	3196.6 lb (1450 kg)	3328.9 lb (1510 kg)
Maximum gross weight	4034.4 lb (1830 kg)	4034.4 lb (1830 kg)
Luggage capacity (seats folded down)	10.2 cu ft / 24.7 cu ft (290 liter / 700 liter)	8.8 cu ft (250 liter)
Fuel tank capacity	15.8 gal (60 liter)	15.8 gal (60 liter)
Drag coefficient	0.32	0.34

Audi Space Frame Technical Design

The hybrid Audi Space Frame (ASF) first used in the 2008 TT is also used in the TT RS Coupe and TT RS Roadster.
Sheet steel and aluminum sheet metal components, aluminum castings, and aluminum extruded sections form the TT RS body structure. Vehicle weight distribution is optimized by using sheet steel components in the rear facia, improving driving dynamics and acceleration.

Aluminum castings
Sheet aluminum components
Aluminum extruded sections
Sheet steel components