1991 BMW Z1 vs. 1985 Ford Sierra
To start off, 1991 BMW Z1 is newer by 6 year(s). Which means there will be less support and parts availability for 1985 Ford Sierra. In addition, the cost of maintenance, including insurance, on 1985 Ford Sierra would be higher. At 2,790 cc (6 cylinders), 1985 Ford Sierra is equipped with a bigger engine. In terms of performance, 1991 BMW Z1 (175 HP @ 5800 RPM) has 27 more horse power than 1985 Ford Sierra. (148 HP @ 5700 RPM). In normal driving conditions, 1991 BMW Z1 should accelerate faster than 1985 Ford Sierra. With that said, vehicle weight also plays an important factor in acceleration. 1991 BMW Z1 weights approximately 45 kg more than 1985 Ford Sierra. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Let's talk about torque, 1991 BMW Z1 (230 Nm @ 4000 RPM) has 10 more torque (in Nm) than 1985 Ford Sierra. (220 Nm @ 3800 RPM). This means 1991 BMW Z1 will have an easier job in driving up hills or pulling heavy equipment than 1985 Ford Sierra.
Compare all specifications:
| 1991 BMW Z1 | 1985 Ford Sierra | |
| Make | BMW | Ford |
| Model | Z1 | Sierra |
| Year Released | 1991 | 1985 |
| Engine Position | Front | Front |
| Engine Size | 2497 cc | 2790 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | in-line | in-line |
| Horse Power | 175 HP | 148 HP |
| Engine RPM | 5800 RPM | 5700 RPM |
| Torque | 230 Nm | 220 Nm |
| Torque RPM | 4000 RPM | 3800 RPM |
| Engine Bore Size | 82 mm | 93 mm |
| Engine Stroke Size | 78.8 mm | 68.5 mm |
| Fuel Type | Gasoline | Gasoline |
| Vehicle Weight | 1250 kg | 1205 kg |
| Vehicle Length | 3960 mm | 4400 mm |
| Vehicle Width | 1810 mm | 1680 mm |
| Vehicle Height | 1280 mm | 1370 mm |
| Wheelbase Size | 2450 mm | 2620 mm |
