I get the basic understanding. More torque = you can pull more. More horsepower = more power output.
When I get it on paper, I don’t get it in real life performance. Why does the same Kia Optima with 163HP / 196 Nm petrol engine accelerates faster (9.4 seconds) than 141HP / 340 Nm engine (11 seconds) when it has more torque, so it can pull faster?
Why does a petrol engine outperforms diesel, assuming they both have the same torque, so on paper, they both should pull similarly (assuming they both need to shift into third gear to reach 100km/h)?
In: 0
Bla bla.
Diesel Burns slower, where petrol has a more instant explosion kind or burning, diesel takes ‘ slightly ‘ more time: diesel keeps burning and building up pressure against the piston, while the piston is already traveling down.
Hence, diesel has more torque, as the burning/exploding keeps on going while the piston is already traveling downwards: pressure is still there
Petrol has an explosion and pressure is going down while the piston travels downwards.
Diesel has a lower burning speed, thus the rpm is limited. If the rpm gets to high, there simply isn’t enough time to burn all the diesel before the piston hits bottom. You can’t burn more diesel, so you cant get more power
Petrol has a higher rpm, and thus more petrol can be burnt per minute. More power. But still, not as much torque,.
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