2005 BMW Z4 vs. 1985 Ford Sierra
To start off, 2005 BMW Z4 is newer by 20 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, 2005 BMW Z4 (168 HP @ 6250 RPM) has 20 more horse power than 1985 Ford Sierra. (148 HP @ 5700 RPM). In normal driving conditions, 2005 BMW Z4 should accelerate faster than 1985 Ford Sierra. With that said, vehicle weight also plays an important factor in acceleration. 2005 BMW Z4 weights approximately 120 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, 1985 Ford Sierra (220 Nm @ 3800 RPM) has 10 more torque (in Nm) than 2005 BMW Z4. (210 Nm @ 3500 RPM). This means 1985 Ford Sierra will have an easier job in driving up hills or pulling heavy equipment than 2005 BMW Z4.
Compare all specifications:
| 2005 BMW Z4 | 1985 Ford Sierra | |
| Make | BMW | Ford |
| Model | Z4 | Sierra |
| Year Released | 2005 | 1985 |
| Engine Position | Front | Front |
| Engine Size | 2171 cc | 2790 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | in-line | in-line |
| Horse Power | 168 HP | 148 HP |
| Engine RPM | 6250 RPM | 5700 RPM |
| Torque | 210 Nm | 220 Nm |
| Torque RPM | 3500 RPM | 3800 RPM |
| Engine Bore Size | 80 mm | 93 mm |
| Engine Stroke Size | 72 mm | 68.5 mm |
| Fuel Type | Gasoline - Premium | Gasoline |
| Vehicle Weight | 1325 kg | 1205 kg |
| Vehicle Length | 4100 mm | 4400 mm |
| Vehicle Width | 1790 mm | 1680 mm |
| Vehicle Height | 1310 mm | 1370 mm |
| Wheelbase Size | 2500 mm | 2620 mm |
