The Audi TT Roadster (8S) 2.0 TDI quattro S tronic represents a unique offering within the third-generation TT lineup, produced between November 2014 and 2018. Positioned as a more fuel-efficient alternative to the gasoline-powered variants, this model combined a diesel engine with Audi’s renowned quattro all-wheel-drive system and the quick-shifting S tronic dual-clutch transmission. It catered to drivers seeking a sporty roadster experience with improved economy, particularly in European markets where diesel fuel was prevalent and taxation favored lower emissions. The 8S generation TT, built on the Volkswagen Group’s PQ25 platform (shared with models like the Golf and A3), aimed to blend classic roadster aesthetics with modern technology and performance.
Technical Specifications
| Brand | Audi |
| Model | TT |
| Generation | TT Roadster (8S) |
| Type (Engine) | 2.0 TDI (184 Hp) quattro S tronic |
| Start of production | November, 2014 |
| End of production | 2018 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Roadster |
| Seats | 2 |
| Doors | 2 |
| Fuel consumption (urban) | 6.3-6.4 l/100 km (37.3 – 36.8 US mpg, 44.8 – 44.1 UK mpg, 15.9 – 15.6 km/l) |
| Fuel consumption (extra urban) | 4.9-5.1 l/100 km (48 – 46.1 US mpg, 57.6 – 55.4 UK mpg, 20.4 – 19.6 km/l) |
| Fuel consumption (combined) | 5.4-5.6 l/100 km (43.6 – 42 US mpg, 52.3 – 50.4 UK mpg, 18.5 – 17.9 km/l) |
| CO2 emissions | 142-147 g/km |
| Fuel Type | Diesel |
| Acceleration 0 – 100 km/h | 7 sec |
| Acceleration 0 – 62 mph | 7 sec |
| Acceleration 0 – 60 mph | 6.7 sec |
| Maximum speed | 230 km/h (142.92 mph) |
| Emission standard | Euro 6 |
| Weight-to-power ratio | 8 kg/Hp, 125.6 Hp/tonne |
| Weight-to-torque ratio | 3.9 kg/Nm, 259.4 Nm/tonne |
| Power | 184 Hp @ 3500-4000 rpm |
| Power per litre | 93.5 Hp/l |
| Torque | 380 Nm @ 1750-3250 rpm (280.27 lb.-ft. @ 1750-3250 rpm) |
| Engine layout | Front, Transverse |
| Engine Model/Code | CUNA |
| Engine displacement | 1968 cm3 (120.09 cu. in.) |
| Number of cylinders | 4 |
| Engine configuration | Inline |
| Cylinder Bore | 81 mm (3.19 in.) |
| Piston Stroke | 95.5 mm (3.76 in.) |
| Compression ratio | 15.8:1 |
| Number of valves per cylinder | 4 |
| Fuel injection system | Diesel Commonrail |
| Engine aspiration | Turbocharger, Intercooler |
| Engine oil capacity | 4.6 l (4.86 US qt | 4.05 UK qt) |
| Coolant | 12 l (12.68 US qt | 10.56 UK qt) |
| Kerb Weight | 1465 kg (3229.77 lbs.) |
| Max. weight | 1785 kg (3935.25 lbs.) |
| Max load | 320 kg (705.48 lbs.) |
| Trunk (boot) space – minimum | 280 l (9.89 cu. ft.) |
| Fuel tank capacity | 55 l (14.53 US gal | 12.1 UK gal) |
| Length | 4177 mm (164.45 in.) |
| Width | 1832 mm (72.13 in.) |
| Width including mirrors | 1966 mm (77.4 in.) |
| Height | 1355 mm (53.35 in.) |
| Wheelbase | 2505 mm (98.62 in.) |
| Front track | 1572 mm (61.89 in.) |
| Rear (Back) track | 1552 mm (61.1 in.) |
| Front overhang | 884 mm (34.8 in.) |
| Rear overhang | 788 mm (31.02 in.) |
| Drag coefficient (Cd) | 0.32 |
| Minimum turning circle | 10.96 m (35.96 ft.) |
| Drive wheel | All wheel drive (4×4) |
| Number of gears and type of gearbox | 6 gears, automatic transmission S tronic |
| Front suspension | Independent, type McPherson with coil spring and anti-roll bar |
| Rear suspension | Independent coil spring |
| Front brakes | Ventilated discs |
| Rear brakes | Disc |
Powertrain & Engine Architecture
The heart of the TT Roadster 2.0 TDI quattro S tronic is the CUNA engine, a 2.0-liter inline-four cylinder diesel. This engine is part of the Volkswagen Group’s modular engine family and features common-rail direct injection, a turbocharger with intercooling, and four valves per cylinder. The CUNA engine produces 184 horsepower at 3500-4000 rpm and a substantial 380 Nm (280 lb-ft) of torque between 1750 and 3250 rpm. This broad torque curve is characteristic of diesel engines and contributes to strong mid-range acceleration. The engine utilizes a diesel particulate filter (DPF) to meet stringent Euro 6 emissions standards. Paired with the engine is the S tronic 6-speed dual-clutch transmission. This transmission offers rapid, seamless gear changes and contributes to the car’s sporty driving feel. The quattro all-wheel-drive system distributes power between the front and rear axles as needed, enhancing traction and stability, particularly in adverse weather conditions.
Driving Characteristics
The 2.0 TDI quattro S tronic delivers a refined and capable driving experience. While not as overtly sporty as the gasoline-powered TT variants, the diesel engine’s ample torque provides strong acceleration in everyday driving situations. The 0-60 mph time of around 6.7 seconds is respectable for a roadster. The S tronic transmission shifts quickly and smoothly, and the quattro system provides excellent grip. The gear ratios are tuned for a balance of performance and fuel efficiency. Compared to the 2.0 TFSI models, the TDI offers less peak horsepower but significantly more torque lower in the rev range. Manual transmission versions of the 2.0 TDI, while available, were less common and offered a more engaging, albeit less convenient, driving experience. The diesel’s weight, combined with the all-wheel-drive system, does result in a slightly higher curb weight than some of its gasoline counterparts.
Equipment & Trim Levels
The 2.0 TDI quattro S tronic typically came well-equipped, reflecting Audi’s premium positioning. Standard features included leather upholstery, automatic climate control, a multi-function steering wheel, and the Audi MMI infotainment system with a central display screen. Optional extras included features like navigation, a premium sound system, heated seats, and parking sensors. The TT Roadster offered a range of customization options, allowing buyers to personalize the interior and exterior to their preferences. Trim levels were relatively streamlined, with most differences stemming from optional packages rather than distinct model designations.
Chassis & Braking
The TT Roadster’s chassis features a McPherson strut front suspension and an independent coil spring rear suspension. Stabilizer bars are fitted to both axles to reduce body roll during cornering. The braking system consists of ventilated discs at the front and solid discs at the rear. Anti-lock braking system (ABS) is standard. The suspension tuning is geared towards providing a comfortable yet sporty ride, balancing handling precision with everyday usability. The steering is a power-assisted rack and pinion system, offering precise and responsive control.
Market Reception & Comparison
The Audi TT Roadster 2.0 TDI quattro S tronic was generally well-received by automotive critics. It was praised for its fuel efficiency, comfortable ride, and refined driving experience. However, some reviewers noted that the diesel engine lacked the excitement of the gasoline-powered variants. Compared to the 2.0 TFSI models, the TDI offered superior fuel economy but slightly less outright performance. The TDI also tended to hold its value well, due to its reputation for reliability and efficiency. Against competitors like the BMW Z4 and Porsche Boxster, the TT Roadster 2.0 TDI offered a compelling combination of style, performance, and practicality.
Legacy
The CUNA engine, when properly maintained, has proven to be a durable and reliable unit. The S tronic transmission is also generally robust, although regular servicing is essential. On the used car market, the TT Roadster 2.0 TDI quattro S tronic represents a good value proposition for buyers seeking a stylish and efficient roadster. However, potential buyers should be aware of the potential costs associated with maintaining a diesel vehicle, including DPF maintenance and AdBlue refills. The model remains a popular choice for those who appreciate the blend of Audi’s engineering prowess and the practicality of a diesel engine.
