Comparison Audi TT RS Roadster (8J) 2.5 TFSI (340 Hp) & Alfa Romeo 166 (936) 2.4 JTD (136 Hp)
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| Brand: | Audi | Alfa Romeo |
| Model: | TT | 166 |
| Generation: | TT RS Roadster (8J) | 166 (936) |
| Engine / modification: | 2.5 TFSI (340 Hp) | 2.4 JTD (136 Hp) |
| Production start: | 2009 year | 1998 year |
| Production end: | 2010 year | 2001 year |
| Coupe type: | Roadster | Sedan |
| Num. of Doors: | 2 | 4 |
| Num. of seats: | 2 | 5 |
| Fuel consumption / economy - urban: | 13.3 l/100 km | 9.9 l/100 km |
| Fuel consumption / economy - extra urban: | 7.2 l/100 km | 5.7 l/100 km |
| Fuel consumption / economy - combined: | 9.5 l/100 km | 7.3 l/100 km |
| Fuel Type: | Petrol (Gasoline) | Diesel |
| Drag coefficient: | 0.34 | |
| Fuel tank volume: | 60 l | 72 l |
| Emission standard: | Euro 5 | |
| CO2 emissions: | 221 g/km | |
| Power: | 340 hp | 136 hp |
| Max power in: | 5400-6500 rpm. | 4200 rpm. |
| Maximum speed: | 250 km/h | 202 km/h |
| Acceleration from 0 to 100 km/h: | 4.7 sec | 9.9 sec |
| Torque: | 450 Nm @ 1600-6500 rpm. | 304 Nm @ 2000 rpm. |
| Model Engine: | CEPA | AR 34202 |
| Engine position: | Front, transverse | Front, transverse |
| Engine displacement: | 2480 cm3 | 2387 cm3 |
| Engine oil capacity: | 6.5 l | 5 l |
| Coolant: | 9.1 l | |
| Fuel System: | Direct injection | Diesel Commonrail |
| Aspiration / Turbine: | Turbo / Intercooler (Turbocharging / Intercooler) | Turbocharging |
| Position of cylinders: | Inline | Inline |
| Valvetrain: | DOHC | OHC |
| Number of cylinders: | 5 | 5 |
| Number of valves per cylinder: | 4 | 2 |
| Compression ratio: | 10 | 18.5 |
| Piston Stroke: | 92.8 mm | 90.4 mm |
| Cylinder Bore: | 82.5 mm | 82 mm |
| Wheel Drive: | All wheel drive (4x4) | Front wheel drive |
| Number of Gears (automatic transmission): | - | |
| Number of Gears (manual transmission): | 6 | 6 |
| Length: | 4198 mm | 4720 mm |
| Width: | 1842 mm | 1815 mm |
| Width including mirrors: | 1952 mm | |
| Height: | 1348 mm | 1416 mm |
| Wheelbase: | 2468 mm | 2700 mm |
| Front track: | 1555 mm | 1545 mm |
| Rear (Back) track: | 1546 mm | 1532 mm |
| Minimum volume of Luggage (trunk): | 250 l | 500 l |
| Front suspension: | Independent, Spring McPherson, with stabilizer | Double wishbone |
| Rear suspension: | Independent, spring multi-link with stabilizer | Several levers and rods |
| Max weight: | 1830 kg | 2000 kg |
| Front brakes: | Ventilated discs | Ventilated discs |
| Rear brakes: | Disc | Disc |
| Kerb Weight: | 1510 kg | 1490 kg |
| ABS: | yes | yes |
| Steering type: | Steering rack and pinion | Steering rack and pinion |
| Power steering: | Electric Steering | Hydraulic Steering |
| Minimum turning circle (turning diameter): | 10.7 m | |
| Tire size: | 245/40 R18 | 205/55 R16W |
| Wheel rims size: | 9J x 18 | R16 |