1991 BMW Z1 vs. 1984 Ford Sierra
To start off, 1991 BMW Z1 is newer by 7 year(s). Which means there will be less support and parts availability for 1984 Ford Sierra. In addition, the cost of maintenance, including insurance, on 1984 Ford Sierra would be higher. At 2,497 cc (6 cylinders), 1991 BMW Z1 is equipped with a bigger engine. In terms of performance, 1991 BMW Z1 (175 HP @ 5800 RPM) has 100 more horse power than 1984 Ford Sierra. (75 HP @ 4800 RPM). In normal driving conditions, 1991 BMW Z1 should accelerate faster than 1984 Ford Sierra. With that said, vehicle weight also plays an important factor in acceleration. 1991 BMW Z1 weights approximately 210 kg more than 1984 Ford Sierra. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
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, 1991 BMW Z1 (230 Nm @ 4000 RPM) has 107 more torque (in Nm) than 1984 Ford Sierra. (123 Nm @ 2900 RPM). This means 1991 BMW Z1 will have an easier job in driving up hills or pulling heavy equipment than 1984 Ford Sierra.
Compare all specifications:
| 1991 BMW Z1 | 1984 Ford Sierra | |
| Make | BMW | Ford |
| Model | Z1 | Sierra |
| Year Released | 1991 | 1984 |
| Engine Position | Front | Front |
| Engine Size | 2497 cc | 1593 cc |
| Engine Cylinders | 6 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Horse Power | 175 HP | 75 HP |
| Engine RPM | 5800 RPM | 4800 RPM |
| Torque | 230 Nm | 123 Nm |
| Torque RPM | 4000 RPM | 2900 RPM |
| Engine Bore Size | 82 mm | 87.7 mm |
| Engine Stroke Size | 78.8 mm | 66 mm |
| Engine Compression Ratio | 11.0:1 | 9.5:1 |
| Drive Type | Rear | Rear |
| Transmission Type | Manual | Manual |
| Number of Seats | 2 seats | 5 seats |
| Vehicle Weight | 1250 kg | 1040 kg |
| Vehicle Length | 3960 mm | 4430 mm |
| Vehicle Width | 1810 mm | 1730 mm |
| Vehicle Height | 1280 mm | 1370 mm |
| Wheelbase Size | 2450 mm | 2610 mm |
