2006 BMW Z4 vs. 1991 Rolls-Royce Silver Spur
To start off, 2006 BMW Z4 is newer by 15 year(s). Which means there will be less support and parts availability for 1991 Rolls-Royce Silver Spur. In addition, the cost of maintenance, including insurance, on 1991 Rolls-Royce Silver Spur would be higher. At 6,750 cc (8 cylinders), 1991 Rolls-Royce Silver Spur is equipped with a bigger engine. In terms of performance, 1991 Rolls-Royce Silver Spur (301 HP @ 4000 RPM) has 112 more horse power than 2006 BMW Z4. (189 HP @ 6000 RPM) In normal driving conditions, 1991 Rolls-Royce Silver Spur should accelerate faster than 2006 BMW Z4. With that said, vehicle weight also plays an important factor in acceleration. 1991 Rolls-Royce Silver Spur weights approximately 1135 kg more than 2006 BMW Z4. 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 Rolls-Royce Silver Spur (600 Nm @ 2000 RPM) has 355 more torque (in Nm) than 2006 BMW Z4. (245 Nm @ 3500 RPM). This means 1991 Rolls-Royce Silver Spur will have an easier job in driving up hills or pulling heavy equipment than 2006 BMW Z4.
Compare all specifications:
| 2006 BMW Z4 | 1991 Rolls-Royce Silver Spur | |
| Make | BMW | Rolls-Royce |
| Model | Z4 | Silver Spur |
| Year Released | 2006 | 1991 |
| Engine Position | Front | Front |
| Engine Size | 2494 cc | 6750 cc |
| Engine Cylinders | 6 cylinders | 8 cylinders |
| Engine Type | in-line | V |
| Horse Power | 189 HP | 301 HP |
| Engine RPM | 6000 RPM | 4000 RPM |
| Torque | 245 Nm | 600 Nm |
| Torque RPM | 3500 RPM | 2000 RPM |
| Engine Bore Size | 84 mm | 104.1 mm |
| Engine Stroke Size | 75 mm | 99.1 mm |
| Fuel Type | Gasoline | Gasoline |
| Drive Type | Rear | Rear |
| Number of Seats | 2 seats | 5 seats |
| Number of Doors | 2 doors | 4 doors |
| Vehicle Weight | 1335 kg | 2470 kg |
| Vehicle Length | 4100 mm | 5400 mm |
| Vehicle Width | 1790 mm | 1890 mm |
| Vehicle Height | 1310 mm | 1490 mm |
| Wheelbase Size | 2500 mm | 3170 mm |
| Fuel Tank Capacity | 55 L | 108 L |
