The engine lineup for the Q5 showcases the bundled technological know-how of Audi. Fuel economy was improved by up to 15 percent in the three TDI and two TFSI engines, even though most units gained in power and torque. All engines are turbocharged direct-injection units with high torque. The start-stop system – which also operates at low temperatures thanks to a powerful battery – is standard with all engines; even the cooling fan was optimized for maximum efficiency.
The modified 2.0 TDI, which works with 1,968 cc of engine displacement, is available in two versions. Its technical finesses are its low internal friction, turbocharger with adjustable guide vanes and centrifugal pendulum in the dual-mass flywheel. This makes the engine run even more quietly at low speeds, and it enables earlier upshifting and therefore more efficient driving.
The first version, the 2.0 TDI, produces 105 kW (143 hp) and 320 Nm (236.02 lb-ft) of torque; this torque is available from 1,750 to 2,500 rpm. The four-cylinder engine has a combined fuel consumption of 5.3 liters of diesel per 100 km (44.38 US mpg) – equivalent to 139 grams per km (223.70 g/mile) CO2. Acceleration from zero to 100 km/h (62.14 mph) takes 10.9 seconds, and its top speed is 192 km/h (119.30 mph).
The second version of the two-liter engine boosts power to 130 kW (177 hp) and torque to 380 Nm (280.27 lb-ft), also from 1,750 to 2,500 rpm. With the S tronic, the sprint to highway speed (62.14 mph) is completed in 9.0 seconds, and it reaches its top speed at 200 km/h (124.27 mph). The powerful 2.0 TDI has a combined fuel consumption of 6.0 liters of fuel per 100 km (39.20 US mpg) with CO2 emissions of 159 grams per km (255.89 g/mile).
The top engine of the TDI lineup is the completely redesigned 3.0 TDI, which mobilizes 2,967 cc of displacement. Its key properties are its low weight of slightly over 190 kg (418.88 lb), an energy-saving chain drive, low internal friction, demand-regulated oil pump and complex thermal management system: the crankcase and cylinder heads have separate cooling circuits that are interconnected by control valves.
The V6 diesel produces 180 kW (245 hp) and transfers 580 Nm (427.79 lb-ft) of torque to the crankshaft between 1,750 and 2,750 rpm. It accelerates the Q5 from zero to 100 km/h (62.14 mph) in 6.5 seconds and to a top speed of 225 km/h (139.81 mph). It has a combined fuel consumption of just 6.4 liters of fuel per 100 km (36.75 US mpg), which is equivalent to 169 grams CO2 per km (271.98 g/mile).
Completely new: 2.0 TFSI
The gasoline engines also combine strong performance with astonishing efficiency. The 2.0 TFSI, which mobilizes 1,984 cc of displacement, appears as an entirely new development with innovative solutions in many technical areas. It is the successor to the engine that was selected “Engine of the Year” five years in a row.
The new four-cylinder engine exhibits a torque curve like a TDI – it attains its maximum torque of 350 Nm (258.15 lb-ft) at a low 1,500 rpm and maintains it at a constant value up to 4,500 rpm. It outputs its full 165 kW (225 hp) of power at a low 4,500 rpm. With a manual transmission, the 2.0 TFSI accelerates the Audi Q5 from zero to 100 km/h (62.14 mph) in 7.6 seconds (tiptronic: 7.1 seconds) and to a top speed of 222 km/h (137.94 mph).
Its combined fuel consumption is only 7.6 liters of fuel per 100 km (30.95 US mpg) (with tiptronic: 7.9 liters [29.77 US mpg]) – equivalent to CO2 emissions of 176 (184) grams per km (283.24 [296.12] g/mile).
One innovation in the 2.0 TFSI is the addition of indirect fuel injection. This supplements FSI direct gasoline injection under part-load conditions, improving fuel economy and reducing particulate emissions. FSI injection, which operates at up to 200 bar pressure, is utilized at engine start and higher loads. In terms of filling the combustion chambers, engineers have implemented new degrees of freedom: both camshafts can be adjusted as necessary; on the exhaust side, the Audi valvelift system varies valve stroke over two stages as well.
In the innovative thermal management system, two rotary vanes incorporated in one module regulate the flow of coolant. They ensure that the engine oil heats quickly to its operating temperature after an engine start, and they regulate coolant temperature between 85 and 107 degrees Celsius depending on the driving situation. This achieves an optimal relationship between minimal friction and high thermodynamic efficiency under all load and engine speed conditions.
The exhaust manifold of the four-cylinder engine is integrated in the cylinder head where coolant circulates around it. This solution reduces the temperature of the exhaust gas, which improves fuel efficiency during a sporty mode of driving, because it avoids full-throttle enrichment. A newly developed turbocharger also makes its appearance here. Its key improvement is an electric wastegate adjuster, which regulates charge pressure extremely fast and precisely – making engine response even more spontaneous.
Internal friction has been significantly reduced as well – by a new type of coating on the piston skirts and a low-friction bearing on the two balancer shafts for very smooth engine running. The regulated oil pump consumes very little energy.
Top gasoline engine: the 3.0 TFSI with supercharger
The most powerful gasoline engine in the Q5 is the new 3.0 TFSI, which replaces the naturally aspirated 3.2-liter engine. Its supercharger, which is belt-driven by the crankshaft, is mounted in the 90-degree V of the cylinder banks. Inside this unit, two rotary pistons turn at a speed of over 20,000 rpm; the air gap between them measures just a few thousandths of a millimeter. The mechanical charger compresses the induction air to up to 0.8 bar; two intercoolers then cool it.
The supercharger is located after the throttle valve, which improves its efficiency. Short gas pathways downstream result in an early and steep rise in the torque curve. Various actions have been taken to acoustically isolate supercharger noise; a balancer shaft in the engine’s lightweight alloy crankcase improves smooth running properties. Adjustable intake camshafts and flaps in the induction channels assure optimal filling of the combustion chambers.
The 3.0 TFSI, which produces its power from 2,995 cc engine displacement, is a powerful and resonant-sounding engine. It outputs 200 kW (272 hp) and produces 400 Nm (295.02 lb-ft) of torque between 2,150 and 4,780 rpm. The standard sprint to 100 km/h (62.14 mph) is completed in 5.9 seconds, and its acceleration ends at 234 km/h (145.40 mph). The engine’s standardized fuel consumption value is just 8.5 liters per 100 km (27.67 US mpg) – with CO2 emissions of 199 grams per km (320.26 g/mile).
The equipment and data specified in this document refer to the model range offered in Germany. Subject to change without notice; errors and omissions excepted.