2004 BMW Z4 vs. 1973 BMW 1502
To start off, 2004 BMW Z4 is newer by 31 year(s). Which means there will be less support and parts availability for 1973 BMW 1502. In addition, the cost of maintenance, including insurance, on 1973 BMW 1502 would be higher. At 2,494 cc (6 cylinders), 2004 BMW Z4 is equipped with a bigger engine. In terms of performance, 2004 BMW Z4 (185 HP @ 6000 RPM) has 100 more horse power than 1973 BMW 1502. (85 HP @ 5800 RPM). In normal driving conditions, 2004 BMW Z4 should accelerate faster than 1973 BMW 1502. With that said, vehicle weight also plays an important factor in acceleration. 2004 BMW Z4 weights approximately 366 kg more than 1973 BMW 1502. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Let's talk about torque, 2004 BMW Z4 (245 Nm @ 3500 RPM) has 115 more torque (in Nm) than 1973 BMW 1502. (130 Nm @ 3500 RPM). This means 2004 BMW Z4 will have an easier job in driving up hills or pulling heavy equipment than 1973 BMW 1502.
Compare all specifications:
| 2004 BMW Z4 | 1973 BMW 1502 | |
| Make | BMW | BMW |
| Model | Z4 | 1502 |
| Year Released | 2004 | 1973 |
| Engine Position | Front | Front |
| Engine Size | 2494 cc | 1573 cc |
| Engine Cylinders | 6 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 4 valves | 2 valves |
| Horse Power | 185 HP | 85 HP |
| Engine RPM | 6000 RPM | 5800 RPM |
| Torque | 245 Nm | 130 Nm |
| Torque RPM | 3500 RPM | 3500 RPM |
| Engine Bore Size | 84 mm | 84 mm |
| Engine Stroke Size | 75 mm | 71 mm |
| Engine Compression Ratio | 11.0:1 | 8.6:1 |
| Fuel Type | Gasoline - Premium | Gasoline |
| Number of Seats | 2 seats | 5 seats |
| Number of Doors | 2 doors | 2 doors |
| Vehicle Weight | 1296 kg | 930 kg |
| Vehicle Length | 4100 mm | 4240 mm |
| Vehicle Width | 1790 mm | 1600 mm |
| Vehicle Height | 1300 mm | 1420 mm |
| Wheelbase Size | 2500 mm | 2510 mm |
| Fuel Tank Capacity | 55 L | 50 L |
