Audi RS4 vs Audi S8

Picture of Audi S8 (D3)
Picture of Audi RS4 (B7)
Category Audi S8 (D3)Audi RS4 (B7)
Engine layout 5.2 l V104.2 l V8
Max power (ps / bhp) 450 / 444420 / 414
Max torque (Nm / lb-ft) 540 / 398430 / 317
Curb weight (kg / lb) 1940 / 42771749 / 3856
Power / tonne (ps / bhp) 232 / 229240 / 237

Lap Times

Track Audi S8 (D3)Audi RS4 (B7)
Tsukuba 1:08.301:08.37

Acceleration

Speed & distance Audi S8 (D3)Audi RS4 (B7)
0 - 100 kph 4.9 s4.6 s
0 - 200 kph 16.6 s15.4 s
Est. 100 - 200 kph 11.4 s10.8 s
0 - 100 mph 11.6 s10.0 s
Est. 1/8 mile 9.3 s @ 92.6 mph8.9 s @ 95.7 mph
1/4 mile 13.1 s @ 101.9 mph12.8 s @ 109.7 mph

General performance

Category Audi S8 (D3)Audi RS4 (B7)
Top speed 250 kph (155 mph)250 kph (155 mph)
Est. max acceleration 0.59 g (6 m/s²)0.67 g (7 m/s²)
Fuel economy 15.5 l/100 km (15 mpg US / 18 UK)13.0 l/100 km (18 mpg US / 22 UK)

Summary

Category Audi S8 (D3)Audi RS4 (B7)
Track Performance 100100
Straight line speed 719900
Total 8191000

Verdict

RS4 is the fastest by a small margin.

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Timeline

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RobertNichols 2h 

added 20.2 km drive

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FastestLaps 6h 

added laptime for Porsche 911 GT3 (991)

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JimHall 7h 

added 13.8 km drive

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Hoppelmoppel123 11h 

added data for Audi RS 3 Sportback (8Y), laptime for Audi RS 3 Sportback (8Y) and data for VW Polo 1.0 TSI OPF (Mk VI)