Performance

Fuel & HP Specs Calculator

Estimate horsepower, torque, and fuel economy based on engine specifications. See how displacement, aspiration, and fuel type affect performance.

Quick Presets

Results

Enter engine specs to estimate performance

Understanding Specs

Displacement — Engine size in liters
Turbo — Adds ~40% more power
Diesel — More torque, better MPG
HP/Liter — Engine efficiency measure

How to Use

Enter engine displacement in liters
Select number of cylinders
Choose fuel type and aspiration
Review estimated power and economy

FAQs

Is a turbocharged 4-cylinder as good as a V6?

Often yes. A modern turbo 4 can match or exceed a naturally aspirated V6 in power while being more fuel-efficient. Trade-off is typically turbo lag and long-term reliability.

Why do diesels have more torque?

Higher compression ratios and longer strokes in diesel engines produce more torque at lower RPMs. This makes them ideal for towing and heavy-duty applications.

What is HP per liter?

A measure of engine efficiency. Modern turbo engines often exceed 100 HP/L, while NA engines typically produce 60-80 HP/L. Higher is generally more advanced engineering.

Does E85 make more power?

Yes, E85's higher octane allows more aggressive timing on tuned vehicles, yielding 5-10% more power. Stock vehicles typically see minimal gains.

Limitations

Estimates based on typical engines
Actual specs vary by manufacturer
Does not account for modifications
Fuel economy depends on driving habits

Fuel & HP Specs Calculator

Engine Specifications

Engine Configuration

Quick Presets

Results

Power Output

Fuel Economy (Estimated)

Annual Costs