1981 BMW 725 vs. 2009 Dodge Viper
To start off, 2009 Dodge Viper is newer by 28 year(s). Which means there will be less support and parts availability for 1981 BMW 725. In addition, the cost of maintenance, including insurance, on 1981 BMW 725 would be higher. At 8,285 cc (10 cylinders), 2009 Dodge Viper is equipped with a bigger engine. In terms of performance, 2009 Dodge Viper (499 HP @ 5600 RPM) has 351 more horse power than 1981 BMW 725. (148 HP @ 5500 RPM) In normal driving conditions, 2009 Dodge Viper should accelerate faster than 1981 BMW 725.
Both vehicles are rear wheel drive (RWD) - it offers better handling in dry conditions; in addition, if you are looking to drift, both vehicles do the job better than front wheel drive vehicles. With that said, do keep in mind that many other factors such as speed and the wear on your tires can also have significant impact on traction and control. Let's talk about torque, 2009 Dodge Viper (711 Nm @ 4200 RPM) has 496 more torque (in Nm) than 1981 BMW 725. (215 Nm @ 4000 RPM). This means 2009 Dodge Viper will have an easier job in driving up hills or pulling heavy equipment than 1981 BMW 725.
Compare all specifications:
| 1981 BMW 725 | 2009 Dodge Viper | |
| Make | BMW | Dodge |
| Model | 725 | Viper |
| Year Released | 1981 | 2009 |
| Body Type | Sedan | Roadster |
| Engine Position | Front | Front |
| Engine Size | 2493 cc | 8285 cc |
| Engine Cylinders | 6 cylinders | 10 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 2 valves | 2 valves |
| Horse Power | 148 HP | 499 HP |
| Engine RPM | 5500 RPM | 5600 RPM |
| Torque | 215 Nm | 711 Nm |
| Torque RPM | 4000 RPM | 4200 RPM |
| Engine Bore Size | 86 mm | 102.4 mm |
| Engine Stroke Size | 71.6 mm | 100.6 mm |
| Engine Compression Ratio | 9.6:1 | 10.0:1 |
| Fuel Type | Gasoline | Gasoline |
| Drive Type | Rear | Rear |
| Number of Seats | 5 seats | 2 seats |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Length | 4870 mm | 4470 mm |
| Vehicle Width | 1810 mm | 1950 mm |
| Vehicle Height | 1440 mm | 1220 mm |
| Wheelbase Size | 2810 mm | 2520 mm |
