2004 Audi A6 vs. 2007 Audi S4
To start off, 2007 Audi S4 is newer by 3 year(s). Which means there will be less support and parts availability for 2004 Audi A6. In addition, the cost of maintenance, including insurance, on 2004 Audi A6 would be higher. At 4,163 cc (8 cylinders), 2007 Audi S4 is equipped with a bigger engine. In terms of performance, 2007 Audi S4 (341 HP @ 7000 RPM) has 120 more horse power than 2004 Audi A6. (221 HP @ 4000 RPM) In normal driving conditions, 2007 Audi S4 should accelerate faster than 2004 Audi A6.
Let's talk about torque, 2004 Audi A6 (450 Nm @ 1400 RPM) has 40 more torque (in Nm) than 2007 Audi S4. (410 Nm @ 3500 RPM). This means 2004 Audi A6 will have an easier job in driving up hills or pulling heavy equipment than 2007 Audi S4.
Compare all specifications:
| 2004 Audi A6 | 2007 Audi S4 | |
| Make | Audi | Audi |
| Model | A6 | S4 |
| Year Released | 2004 | 2007 |
| Body Type | Station Wagon | Sedan |
| Engine Position | Front | Front |
| Engine Size | 2967 cc | 4163 cc |
| Engine Cylinders | 6 cylinders | 8 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 4 valves | 5 valves |
| Horse Power | 221 HP | 341 HP |
| Engine RPM | 4000 RPM | 7000 RPM |
| Torque | 450 Nm | 410 Nm |
| Torque RPM | 1400 RPM | 3500 RPM |
| Engine Compression Ratio | 17.0:1 | 11.0:1 |
| Fuel Type | Diesel | Gasoline |
| Top Speed | 235 km/hour | 249 km/hour |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 5 doors | 4 doors |
| Vehicle Length | 4940 mm | 4590 mm |
| Vehicle Width | 1860 mm | 1730 mm |
| Vehicle Height | 1470 mm | 1430 mm |
| Wheelbase Size | 2770 mm | 2650 mm |
| Fuel Tank Capacity | 80 L | 63 L |
