Both turbocharged and supercharged engines are forms of forced induction, which means they use external power to force more air into the cylinders, resulting in more power output. Here's the difference between them:
Turbocharged Engines:
* Uses a turbine powered by exhaust gases: Exhaust gases spin a turbine, which is connected to a compressor. This compressor forces air into the intake manifold.
* Lag: Turbochargers have a slight delay (turbo lag) before they start spooling up and delivering boost. This lag is noticeable at lower RPMs.
* Higher potential power gains: Turbochargers can achieve higher boost pressures than superchargers, resulting in greater power gains.
* More efficient: Turbochargers use waste energy from the exhaust to create boost, making them more fuel-efficient.
Supercharged Engines:
* Uses a belt-driven compressor: A belt connected to the crankshaft drives the compressor, which forces air into the intake manifold.
* Immediate boost: Superchargers provide boost immediately upon acceleration because they are directly connected to the engine.
* Lower boost pressure: Superchargers typically generate lower boost pressures compared to turbochargers.
* Less efficient: Supercharged engines use engine power to drive the compressor, making them slightly less fuel-efficient than turbocharged engines.
In summary:
| Feature | Turbocharged Engine | Supercharged Engine |
|---|---|---|
| Boost Source | Exhaust gases | Engine crankshaft |
| Boost Delivery | Lagged | Immediate |
| Boost Pressure | Higher | Lower |
| Efficiency | More efficient | Less efficient |
| Cost | Generally cheaper | More expensive |
Ultimately, both turbocharging and supercharging are effective ways to increase engine power. The choice between them depends on factors like the desired power delivery, fuel efficiency, and cost.
