2005 Audi S4 vs. 1981 Mazda RX-7
To start off, 2005 Audi S4 is newer by 24 year(s). Which means there will be less support and parts availability for 1981 Mazda RX-7. In addition, the cost of maintenance, including insurance, on 1981 Mazda RX-7 would be higher. At 4,161 cc (8 cylinders), 2005 Audi S4 is equipped with a bigger engine. In terms of performance, 2005 Audi S4 (340 HP @ 6300 RPM) has 236 more horse power than 1981 Mazda RX-7. (104 HP @ 6000 RPM). In normal driving conditions, 2005 Audi S4 should accelerate faster than 1981 Mazda RX-7. With that said, vehicle weight also plays an important factor in acceleration. 2005 Audi S4 weights approximately 780 kg more than 1981 Mazda RX-7. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Let's talk about torque, 2005 Audi S4 (410 Nm) has 265 more torque (in Nm) than 1981 Mazda RX-7. (145 Nm). This means 2005 Audi S4 will have an easier job in driving up hills or pulling heavy equipment than 1981 Mazda RX-7.
Compare all specifications:
| 2005 Audi S4 | 1981 Mazda RX-7 | |
| Make | Audi | Mazda |
| Model | S4 | RX-7 |
| Year Released | 2005 | 1981 |
| Body Type | Convertible | Coupe |
| Engine Position | Front | Front |
| Engine Size | 4161 cc | 2292 cc |
| Engine Type | V | dual-disk rotary |
| Horse Power | 340 HP | 104 HP |
| Engine RPM | 6300 RPM | 6000 RPM |
| Torque | 410 Nm | 145 Nm |
| Number of Doors | 2 doors | 2 doors |
| Vehicle Weight | 1840 kg | 1060 kg |
| Vehicle Length | 4580 mm | 4300 mm |
| Vehicle Width | 1780 mm | 1680 mm |
| Vehicle Height | 1400 mm | 1280 mm |
| Wheelbase Size | 2660 mm | 2430 mm |
| Fuel Tank Capacity | 63 L | 65 L |
