# What is the relation between horsepower and weight?

## What is the relation between horsepower and weight?

Calculating Power to Weight Ratio Translation – divide the horsepower of the engine by the weight of the car and that’s your power to weight ratio. For example – the Dodge Viper has a 450 hp engine to accelerate 3,320 lbs. of weight, making its power to weight ratio – . 135 hp per 10 lbs.

Does horsepower matter in electric cars?

Unlike a gasoline engine, electric vehicles (EVs) deliver power a little differently. The main difference is immediate power and torque. A car company may say that one of their gasoline-powered engines has 300 horsepower, but that’s actually peak horsepower.

Is torque or horsepower more important for acceleration?

Basically, the faster the crankshaft spins with the same amount of force, the more power an engine will make. A car with more hp than torque will always be quicker since this gives a car acceleration and speed. This is why low-end torque becomes important for better acceleration in many scenarios.

### What is the best power to weight ratio?

Power list: Best power-to-weight ratios in the world

• 7: Koenigsegg One:1 – 986bhp/tonne.
• 6: Saleen S7 LM – 1000bhp/tonne.
• 5: Ruf 9ff GT9 Vmax – 1030bhp/tonne.
• 4: Ultima Evo – 1073bhp/tonne.
• 3: Caparo T1 – 1074bhp/tonne.
• 2: Hennessey Venom F5 – 1196bhp/tonne.
• 1: Fahlke Larea GT1 S12 – 1267bhp/tonne.

Does less weight mean more horsepower?

adding heavier wheels/tires/brakes will result in a lower HP reading at the wheels. Simply adding weight in the car will not reult in a lower HP figure but the car will perform LIKE it has less power. You are now making each horsepower do more work by adding more weight.

Do Heavier cars need more horsepower?

The thing to keep in mind is that horsepower is heavy. That means the more power your car has, the heavier it will become. Well if you want more power, you need a bigger engine, beefier axles and driveshafts, stronger transmissions, and bigger brakes to handle the extra shove.

#### What electric car has the most horsepower?

Highest Horsepower Electric Cars of 2019

• 2019 BMW i8.
• 2019 Jaguar I-PACE.
• 2019 Land Rover Range Rover Sport. View full gallery.
• 2019 Volvo S90. View full gallery.
• 2019 Volvo S60. View full gallery.
• 2019 Porsche Cayenne. View full gallery.
• 2019 Tesla Model X. View full gallery.
• 2019 Porsche Panamera. View full gallery.

Do I want more horsepower or torque?

So if you want to go faster, and get up to speed quicker, you need more horsepower. Torque, on the other hand, is the expression of a rotational or twisting force. In vehicles, the engines rotate around an axis, thus creating torque.

What is better for towing torque or horsepower?

To sum up, torque plays a greater role in towing than horsepower. This is because of the ‘low-end rpm’ generated by the higher levels of torque, which allows the engine to easily carry heavy loads. A high torque vehicle will be able to tow trailers or other objects with an extremely low value of rpm.

## Why do diesels have more torque?

In the diesel engine, the piston moves to the very top of the cylinder, so the stroke length is longer and as torque equals force multiplied by distance, we have more torque. In order to combust fuel, diesel engines use air compression and with faster compression rate the fuel burns faster thus adding to torque levels.

How many ft lbs is 1 HP?

One horsepower is equivalent to 33,000 foot-pounds per minute, or the power required to lift 550 pounds by one foot in one second, and is equivalent to about 746 watts.

What is a good power to weight ratio for a sports car?

Top 50 Supercars listed by power to weight ratios

Horsepower Power to Weight (hp/lb)
Top Fuel 7,000 304.35
Formula 1 Car 850 54.92
Moto GP 240 69.36
Caparo T1 575 47.42

### What’s the difference between Diesel and electric horsepower?

His belief is that if electric HP was the baseline then diesel HP equivalent would be about 1/2 of electric and gas would end up being about 1/3. That means a 20HP electric tractor would be equivalent to a 40HP diesel or a 60HP gas engine.

What is the power to weight ratio of a diesel engine?

Power-to-weight ratio is equal to thrust per unit mass multiplied by the velocity of any vehicle. A typical turbocharged V8 diesel engine might have an engine power of 250 kW (340 hp) and a mass of 380 kg (840 lb), giving it a power-to-weight ratio of 0.65 kW/kg (0.40 hp/lb).

What does horsepower and torque mean for petrol, diesel and.?

The nature of an electric motor means that it is different again in terms of performance. In a conventional petrol or diesel engine torque and horsepower build to a maximum in a particular rev band. An electric motor’s full power is available as soon as it is switched on, giving it the maximum torque instantly and throughout the journey.

#### Which is better an electric motor or a gas engine?

We often get asked, “How does the horsepower of a gas or diesel engine compare to the kW rating of an electric motor?” The simple answer, which is directionally correct, but not precise is that an electric motor of X kW is comparable to a gas or diesel engine with HP 2-3 times higher. Now, here’s the real answer.