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The other major change under the bonnet is the introduction of stop-start technology for better fuel efficiency. Audi claims an average fuel economy of 8.9 L/100 km (32 mpg ‑imp; 26 mpg ‑US) (compared to the current 12.6 L/100 km [22.4 mpg ‑imp; 18.7 mpg ‑US] in the V8 coupé and 10.7 L/100 km [26 mpg ‑imp; 22 mpg ‑US] in the ...
Its displacement downsizing leads to improved fuel economy, with 14% more power than the 2.0 FSI, but consuming 5% less fuel. The mechanical supercharger compressor, driven at 5 times the speed of the crankshaft, mainly operates at low engine speeds from idle up to 2,400 revolutions per minute (rpm) to increase low-end torque.
The 2010–12 Audi S5 coupé had a 4.2 litre fuel stratified injection (FSI) V8 engine [4] that produces 260 kW (349 hp), while the S5 Cabriolet and Sportback have a supercharged 3.0 litre TFSI V6 engine producing 245 kW (329 hp) which is shared with the 2010 Audi S4 3.0 TFSI quattro sedan and avant.
In 1978, the Audi 2.0 R5 D engine was introduced in the Audi 100 sedan. In 1983, a turbocharged version was introduced, initially for the U.S. market Audi 100. Several Volvo cars, from March 1996 to 2001, were produced with Audi straight-five diesel engines, prior to the introduction of the Volvo D5 turbo-diesel engine; this engine was produced from 2001 to 2017 and was used in several diesel ...
The gas turbine is most efficient at maximum power output in the same way reciprocating engines are most efficient at maximum load. The difference is that at lower rotational speed the pressure of the compressed air drops and thus thermal and fuel efficiency drop dramatically. Efficiency declines steadily with reduced power output and is very ...
Henry Ford had an inline-five engine developed in the late 1930s to early 1940s for a compact economy car design, which never saw production due to lack of demand for small cars in the United States. [11] The first production straight-five petrol engine was the Audi 2.1 R5 introduced in the Audi 100 in 1979.
One of the supercharged engines puts out 272 hp (203 kW) and 295 lb⋅ft (400 N⋅m) of torque. The other engine, also found in the Audi S4 and Audi S5 Cabrio, puts out 333 hp (248 kW) and 325 lb⋅ft (441 N⋅m) of torque is used in the S-line Prestige Q7. Both engines have the same fuel economy.
Brake-specific fuel consumption (BSFC) is a measure of the fuel efficiency of any prime mover that burns fuel and produces rotational, or shaft power. It is typically used for comparing the efficiency of internal combustion engines with a shaft output. It is the rate of fuel consumption divided by the power produced.