2006 Lexus IS vs. 1991 Pontiac Firebird
To start off, 2006 Lexus IS is newer by 15 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, 2006 Lexus IS (176 HP @ 3600 RPM) has 36 more horse power than 1991 Pontiac Firebird. (140 HP @ 4400 RPM). In normal driving conditions, 2006 Lexus IS should accelerate faster than 1991 Pontiac Firebird. With that said, vehicle weight also plays an important factor in acceleration. 2006 Lexus IS weights approximately 320 kg more than 1991 Pontiac Firebird. 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, 2006 Lexus IS (400 Nm @ 2000 RPM) has 156 more torque (in Nm) than 1991 Pontiac Firebird. (244 Nm @ 3600 RPM). This means 2006 Lexus IS will have an easier job in driving up hills or pulling heavy equipment than 1991 Pontiac Firebird.
Compare all specifications:
| 2006 Lexus IS | 1991 Pontiac Firebird | |
| Make | Lexus | Pontiac |
| Model | IS | Firebird |
| Year Released | 2006 | 1991 |
| Body Type | Sedan | Coupe |
| Engine Position | Front | Front |
| Engine Size | 2231 cc | 3128 cc |
| Engine Cylinders | 4 cylinders | 6 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 4 valves | 2 valves |
| Horse Power | 176 HP | 140 HP |
| Engine RPM | 3600 RPM | 4400 RPM |
| Torque | 400 Nm | 244 Nm |
| Torque RPM | 2000 RPM | 3600 RPM |
| Engine Bore Size | 86 mm | 88.9 mm |
| Engine Stroke Size | 96 mm | 84 mm |
| Engine Compression Ratio | 15.8:1 | 8.5:1 |
| Fuel Type | Diesel | Gasoline |
| Top Speed | 220 km/hour | 175 km/hour |
| Drive Type | Rear | Rear |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 4 seats |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Weight | 1730 kg | 1410 kg |
| Vehicle Length | 4580 mm | 4790 mm |
| Vehicle Width | 1810 mm | 1850 mm |
| Vehicle Height | 1430 mm | 1280 mm |
| Wheelbase Size | 2740 mm | 2570 mm |
| Fuel Tank Capacity | 65 L | 59 L |
