2004 BMW Z4 vs. 1975 BMW 315
To start off, 2004 BMW Z4 is newer by 29 year(s). Which means there will be less support and parts availability for 1975 BMW 315. In addition, the cost of maintenance, including insurance, on 1975 BMW 315 would be higher. At 2,171 cc (6 cylinders), 2004 BMW Z4 is equipped with a bigger engine. In terms of performance, 2004 BMW Z4 (168 HP @ 6250 RPM) has 93 more horse power than 1975 BMW 315. (75 HP @ 5800 RPM). In normal driving conditions, 2004 BMW Z4 should accelerate faster than 1975 BMW 315. With that said, vehicle weight also plays an important factor in acceleration. 2004 BMW Z4 weights approximately 315 kg more than 1975 BMW 315. 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, 2004 BMW Z4 (210 Nm @ 3500 RPM) has 100 more torque (in Nm) than 1975 BMW 315. (110 Nm @ 3200 RPM). This means 2004 BMW Z4 will have an easier job in driving up hills or pulling heavy equipment than 1975 BMW 315.
Compare all specifications:
| 2004 BMW Z4 | 1975 BMW 315 | |
| Make | BMW | BMW |
| Model | Z4 | 315 |
| Year Released | 2004 | 1975 |
| Body Type | Convertible | Coupe |
| Engine Position | Front | Front |
| Engine Size | 2171 cc | 1574 cc |
| Engine Cylinders | 6 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Horse Power | 168 HP | 75 HP |
| Engine RPM | 6250 RPM | 5800 RPM |
| Torque | 210 Nm | 110 Nm |
| Torque RPM | 3500 RPM | 3200 RPM |
| Engine Compression Ratio | 10.8:1 | 9.5:1 |
| Top Speed | 220 km/hour | 154 km/hour |
| Drive Type | Rear | Rear |
| Number of Seats | 2 seats | 5 seats |
| Number of Doors | 2 doors | 2 doors |
| Vehicle Weight | 1325 kg | 1010 kg |
| Vehicle Length | 4100 mm | 4360 mm |
| Vehicle Width | 1790 mm | 1620 mm |
| Vehicle Height | 1310 mm | 1390 mm |
| Wheelbase Size | 2500 mm | 2510 mm |
