The RS 5 TDI concept technology study is powered by an enhanced-output V6 3.0 TDI biturbo boosted by an electrically driven turbocharger. This new development makes the diesel engine sportier and more efficient.
The V6 biturbo in the Audi RS 5 TDI concept produces 283 kW (385 hp); from 1,250 to 2,000 rpm it transfers 750 Nm (553.2 lb-ft) of torque to the crankshaft. The red-line is at 5,500 rpm. The supplemental electric turbocharger provides for staggering power when starting off. An electric motor replaces the turbine wheel and accelerates the compressor wheel to over 70,000 rpm in a few hundredths of a second. The exhaust turbochargers also provide as much as 2.4 bar of relative boost pressure.This combination enables the Audi RS 5 TDI concept to sprint from 0 to 100 km/h (62.1 mph) in just four seconds. The 200 km/h (124.3 mph) mark is reached in less than 16 seconds, and top speed is 280 km/h (174.0 mph). The average fuel consumption of less than 5.3 liters of diesel per 100 kilometers (less than 140 grams CO2 per kilometer) (44.4 US mpg/225.3 g/mi) documents the outstanding efficiency.
The new R 18 e‑tron quattro with which Audi competed at Le Mans in June 2014 features an entirely redesigned V6 TDI engine with a 4.0 liter capacity. It develops over 395 kW (537 hp) of power and more than 800 Nm (590.05 lb‑ft) of torque, with injection pressure above 2,800 bar. The hybrid system in the front end – the motor-generator unit and the flywheel mass accumulator – delivers more than 170 kW of power output. Audi entered the 24-hour race in the class up to two megajoules recuperative power. The new ruling limited the available power per lap, but left many other parameters open.
The R 18 TDI marked the beginning of a new era for Audi in 2011 – it was the brand's first closed-top sports prototype. Its TDI engine produced approximately 400 kW (over 540 hp) of power and more than 900 Nm (663.80 lb ft) of torque from just a 3.7 liter capacity. The R 18 TDI achieved a narrow victory in a dramatic Le Mans race. Its successor, the R 18 TDI e tron quattro, combining the V6 TDI with a motor-transmission unit on the front axle, became the first hybrid car to win Le Mans, triumphing in both 2012 and 2013.
In 2010 Audi celebrated its next TDI milestone with a triple triumph in the Le Mans 24-hour race. The fastest R 15 TDI plus improved the 39 year-old distance record by 75.4 km (46.85 miles). It marked the first deployment of a turbocharger with variable turbine geometry (VTG), which improved the car's responsiveness. The key data: 5.5 liter capacity, 10 cylinders, approximately 440 kW (600 hp) power output, over 1,050 Nm (774.44 lb ft) of torque.
The Audi Efficiency Challenge, A to B in September 2009 took participants from North to South through Europe – from Å on the Lofoten archipelago to Bée in Northern Italy. 20 models completed the 4,182 kilometer (2,599 miles) tour, demonstrating that efficiency comes standard in every Audi. The A3 1.6 TDI reached the finish with a remarkable average fuel consumption of just 3.3 liters/100 km (71.28 US mpg). The A4 2.0 TDIe achieved 4.4 liters/100 km (53.46 US mpg).
Audi presented the R8 V12 TDI concept in Detroit in early 2008. A few weeks later, the R8 TDI Le Mans was exhibited at the Geneva Motor Show. Both show cars were powered by a six-liter V12 TDI. The 368 kW (500 hp) engine, developing 1,000 Nm (737.56 lb ft) of torque at 1,750 rpm, accelerated the two-seater from naught to 100 km/h (62.14 mph) in 4.2 seconds and up to a top speed of over 300 km/h (186 mph). The fuel consumption of the concept car was calculated as less than 10 liters per 100 km (23.52 US mpg).
Audi used the 2008 European Soccer Championships in Austria and Switzerland as an opportunity to stage a comparison drive in which eleven A4 2.0 TDI models participated. The route covered around 1,650 km (1,025 miles) from Vienna to Basel and back again. The winners completed the distance on one 65-liter tank of diesel (17.17 US gallons) and an average consumption of 3.32 liters/100 km (70.85 US mpg). Likewise, all 23 Audi cars participating in the “Mileage Marathon,” which took place in the USA in fall 2008, demonstrated their excellent efficiency.
Power and efficiency: The Audi R10 TDI was the first racing car with TDI engine – and an extremely successful one at that. Its V12 delivered around 480 kW (over 650 hp) and more than 1,100 Nm (811.32 lb-ft) of torque, good for a top speed of over 330 km/h (205 mph). The sports prototype was also impressive for its efficiency and durability. By the end of its three-year career, the
R10 TDI had notched up 22 overall wins in 38 races.
In the first A6, launched in 1994, Audi fitted a further development of the five-cylinder TDI; its power output rose to 103 kW (140 hp), its torque to 290 Nm (213.89 lb-ft). A six-speed transmission was standard, permanent all-wheel drive an option. With a top speed of 208 km/h (129.25 mph) and 9.9 seconds for the sprint from 0 to 100 km/h (62.14 mph), the first TDI quattro raised the bar to a new level. The engine became legendary with the TV commercial which asked the question “Where’s the tank?” It was able to cover distances of up to 1,300 kilometers (808 miles) on one tank of fuel.
A large sedan with a body in gleaming polished aluminum – the ASF technology study was the star at the 1993 IAA in Frankfurt. The concept car paved the way for the market launch of the first A8 and also presented the large-capacity 3.3-liter V8 TDI, a further innovation.
In 1992, Gerhard Plattner, a journalist from Tyrol in Austria, set out from Ingolstadt to drive around the world in a standard Audi 80 TDI. The route was 40,273 kilometers (25,024 miles) long; the Austrian completed it with an average speed of 85.8 km/h (53.31 mph) and an average fuel consumption of 3.78 l/100 km (62.23 US mpg). A record fuel consumption of 2.77 liters/100 km (84.92 US mpg) was achieved in the public event “Eco-Champion,” also in the Audi 80 TDI. 3,000 car drivers took part in the competition.
In 1989, an Audi 100 completed the 1,860 kilometer (1,156 miles) journey from Moscow to Berlin with an average fuel consumption of 3.9 liters/100 km (60.31 US mpg). Shortly before, Audi had achieved a spectacular personal best which found a place in the Guinness Book of Records: 4,818 km (2,994 miles) across Central, Southern and Western Europe on a single tank of diesel – an average fuel consumption of 1.76 liters/100 km (133.64 US mpg). A longer gear ratio, increased tire pressure and a restrained road speed were instrumental in achieving this fantastic result.