2007 BMW Z4 vs. 1991 Pontiac Firebird
To start off, 2007 BMW Z4 is newer by 16 year(s). Which means there will be less support and parts availability for 1991 Pontiac Firebird. In addition, the cost of maintenance, including insurance, on 1991 Pontiac Firebird would be higher. At 3,128 cc (6 cylinders), 1991 Pontiac Firebird is equipped with a bigger engine. In terms of performance, 2007 BMW Z4 (215 HP @ 6500 RPM) has 75 more horse power than 1991 Pontiac Firebird. (140 HP @ 4400 RPM). In normal driving conditions, 2007 BMW Z4 should accelerate faster than 1991 Pontiac Firebird. With that said, vehicle weight also plays an important factor in acceleration. 1991 Pontiac Firebird weights approximately 120 kg more than 2007 BMW Z4.
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, 2007 BMW Z4 (250 Nm @ 2750 RPM) has 6 more torque (in Nm) than 1991 Pontiac Firebird. (244 Nm @ 3600 RPM). This means 2007 BMW Z4 will have an easier job in driving up hills or pulling heavy equipment than 1991 Pontiac Firebird. 2007 BMW Z4 has automatic transmission and 1991 Pontiac Firebird has manual transmission. 1991 Pontiac Firebird will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2007 BMW Z4 will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2007 BMW Z4 | 1991 Pontiac Firebird | |
| Make | BMW | Pontiac |
| Model | Z4 | Firebird |
| Year Released | 2007 | 1991 |
| Body Type | Convertible | Coupe |
| Engine Position | Front | Front |
| Engine Size | 2494 cc | 3128 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 4 valves | 2 valves |
| Horse Power | 215 HP | 140 HP |
| Engine RPM | 6500 RPM | 4400 RPM |
| Torque | 250 Nm | 244 Nm |
| Torque RPM | 2750 RPM | 3600 RPM |
| Engine Bore Size | 82 mm | 88.9 mm |
| Engine Stroke Size | 78.8 mm | 84 mm |
| Engine Compression Ratio | 10.5:1 | 8.5:1 |
| Fuel Type | Gasoline | Gasoline |
| Top Speed | 227 km/hour | 175 km/hour |
| Drive Type | Rear | Rear |
| Transmission Type | Automatic | Manual |
| Number of Seats | 2 seats | 4 seats |
| Number of Doors | 2 doors | 2 doors |
| Vehicle Weight | 1290 kg | 1410 kg |
| Vehicle Length | 4100 mm | 4790 mm |
| Vehicle Width | 1790 mm | 1850 mm |
| Vehicle Height | 1310 mm | 1280 mm |
| Wheelbase Size | 2500 mm | 2570 mm |
| Fuel Tank Capacity | 55 L | 59 L |
