High-torque and efficient - The TFSI® engines of the Audi A1

The Audi A1 features TFSI® technology. What makes it so special is that it combines the advantages of FSI® – efficiency and dynamics – with turbocharging that improves the power characteristics even more.

The newly-developed 1.2 TFSI engine, with an output of 63 kW, features a die-cast aluminium engine block with innovative grey cast iron sleeves and maintenance-free inverted tooth chain. The light-weight piston unit is a low-friction component, and the oil and cooling water circuit with dual-circuit cooling circulation ensure excellent system efficiency. The benefits are reflected in the low average consumption of only 5.1 l/100 km and a maximum torque of 160 Nm at 1,500 rpm.

The sporty 1.4 TFSI engine produces 90 kW and has been designed with a high top speed and good fuel consumption values in mind. It powers the Audi A1 up to 203 km/h, with a torque of 200 Nm at 1,500 rpm. Its water-cooled intercooler is integrated into the intake manifold; this reduces the volume of the charge-air system and makes it more dynamic. Audi is one of the first manufacturers to combine the S tronic with the start-stop system. Both systems are synchronised with each other; the A1 thus uses less fuel.

Fuel consumption and emissions data:
Fuel consumption, combined: 3,9-5,3 l/100km
CO2 emissions, combined: 103-124 g/km

Powerhouse - The Audi A1’s TDI engine

Every second Audi currently sold is a diesel. And that’s no surprise − developments such as common rail technology have made the TDI more and more efficient. The logical consequence of these improvements was to put a diesel-powered engine in a racing car. And the trial was a great success. In 2006, the Audi R10 TDI was the first diesel-powered racing car to win the 24 Hours of Le Mans – and it has repeated this victory many times over.

The Audi A1 is also available with a 1.6-litre TDI engine with 77 kW. The common rail injection system works with four injectors and it boasts an excellent combination of performance, driving comfort and engine acoustics. The average consumption of this engine is only 3.9 l/100 km. And the emissions data is even more impressive. With 103 g CO2/km it easily complies with the Euro 5 emissions standard.

Fuel consumption and emissions data
Fuel consumption, combined: 3.9 l/100km
CO2 emissions, combined: 103 g/km

The Audi A1 - Consistently efficient

All of the engines employ direct fuel injection and turbocharging. This downsizing concept coupled with technologies from the Audi modular efficiency platform give them tremendous power with minimal fuel consumption.

Recuperation system

The recuperation system uses an intelligent voltage controller for the generator to recover energy during the braking and coasting phases and store it temporarily in the battery. The next time the car accelerates, this energy flows back into the on-board electrical system, relieving the load on the generator.

Start-stop system

The start-stop system turns the engine off when the car is at rest, if the gear selector lever is in neutral and the driver’s foot has left the clutch pedal. Start-stop then turns the engine back on as soon as the clutch pedal is depressed — all the while functioning quietly, conveniently, and quickly. The start-stop system also harmonizes perfectly with the seven-speed S tronic.

S tronic

The Audi dual-clutch transmission S tronic combines the convenience of a torque converter transmission with the dynamics and efficiency of a manual transmission. It changes gears within a few hundredths of a second without any perceptible interruption of pulling power, smoothly and very comfortably. Weighing only around 70 kilograms (154.32 lb), the seven-speed S tronic also helps to save weight. Its two clutches run dry – the elimination of the oil supply further increases the already high efficiency of the transmission. Power is supplied to the electrohydraulic actuator as needed.

On-board computer with efficiency program

The on-board computer with efficiency program is linked to the driver information system. It displays data relevant to fuel consumption and gives recommendations for efficient driving. An enlarged view of the gear-change indicator signals to the driver when he or she should change gears. Another function provides information on which on-board consumers, such as the climate control system or the rear window defogger, are active and how much fuel they are consuming.