Order books for the all-new S6 saloon (£53,995 on-the-road), S6 Avant (£56,050), S7 Sportback (£61,995) and S8 (£77,900) open next month ahead of first deliveries in July.
The new bi-turbo V8 replaces the naturally aspirated V10 FSI engine in the all-new S6, S6 Avant and S8 models, and in the process improves economy by up to 25%.
In the S6 and S6 Avant the new 4.0 litre, twin-turbo V8 delivers 420 PS and 550 Nm of torque from 1,400 to 5,300 rpm, enough to catapult the S6 from 0 to 62 mph in 4.6 seconds and the S6 Avant in 4.7 seconds, and to spur them on to an electronically governed top speed of 155 mph.
The 4.0 TFSI brings Audi’s downsizing strategy to the high-performance class. Compared to the 5.2 litre V10, it offers stronger performance while improving fuel consumption to an average 29.4 mpg in the S6 and 29.1 mpg in the S6 Avant.
In the S7 Sportback the new 4.0 litre TFSI with its 420 PS and 550 Nm of torque powers the five-door coupe from 0 to 62 mph in 4.7 seconds, and on to a limited top speed of 155 mph. Fuel economy on the combined cycle is 29.4 mpg.
The S8 is the new head of the Audi S model. The 4.0 litre TFSI in the S8 generates 520 PS and delivers a constant 650 Nm of torque to the crankshaft between 1,700 and 5,500 rpm. The result is the sprint from 0-62 mph in 4.2 seconds, and top speed is electronically capped at 155 mph. Combined cycle fuel economy is 28 mpg and emissions are 235 g/km. The 5.2 litre V10 in the previous S8 posted 21.4 mpg in the equivalent test.