1978 BMW 725 vs. 1987 Ford Sierra
To start off, 1987 Ford Sierra is newer by 9 year(s). Which means there will be less support and parts availability for 1978 BMW 725. In addition, the cost of maintenance, including insurance, on 1978 BMW 725 would be higher. At 2,495 cc (6 cylinders), 1978 BMW 725 is equipped with a bigger engine. In terms of performance, 1978 BMW 725 (148 HP @ 5500 RPM) has 44 more horse power than 1987 Ford Sierra. (104 HP @ 5200 RPM). In normal driving conditions, 1978 BMW 725 should accelerate faster than 1987 Ford Sierra.
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, 1978 BMW 725 (215 Nm @ 4000 RPM) has 55 more torque (in Nm) than 1987 Ford Sierra. (160 Nm @ 4000 RPM). This means 1978 BMW 725 will have an easier job in driving up hills or pulling heavy equipment than 1987 Ford Sierra.
Compare all specifications:
| 1978 BMW 725 | 1987 Ford Sierra | |
| Make | BMW | Ford |
| Model | 725 | Sierra |
| Year Released | 1978 | 1987 |
| Body Type | Sedan | Station Wagon |
| Engine Position | Front | Front |
| Engine Size | 2495 cc | 1991 cc |
| Engine Cylinders | 6 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Horse Power | 148 HP | 104 HP |
| Engine RPM | 5500 RPM | 5200 RPM |
| Torque | 215 Nm | 160 Nm |
| Torque RPM | 4000 RPM | 4000 RPM |
| Engine Bore Size | 86.1 mm | 90.8 mm |
| Engine Stroke Size | 71.6 mm | 77 mm |
| Engine Compression Ratio | 9.6:1 | 9.2:1 |
| Fuel Type | Gasoline | Gasoline |
| Drive Type | Rear | Rear |
| Number of Seats | 5 seats | 5 seats |
| Vehicle Length | 4870 mm | 4500 mm |
| Vehicle Width | 1810 mm | 1680 mm |
| Vehicle Height | 1440 mm | 1400 mm |
| Wheelbase Size | 2810 mm | 2620 mm |
