how to work out bhp per ton??


Member +
hi all

im probbaly being very silly, but im not very mathmatically minded!.

could somone tell me how to work out bhp per ton,

or if its easier im after bhp per ton for the following

300bhp(wheels) and car is about 1000kgs
350bhp wheels same
400 wheels



i'll base it on a starlet.

135 (hp) / 0.850kg (weight of car) = 158.8 hp per ton.

i beleive it should be power at fly divided by weight of the vehicle.
Last edited:


Super Moderator
well 300bhp and 1000kg(1ton) = 300bhp/ton
so u put the bhp on top and the tonnage on the bottom.

like so

300/1 = 300bhp/ton

and so on

350/1 = 350bhp/ton
400/1 = 400bhp/ton
or for example 216bhp in a starlet at mayb 860kg(0.86ton) is 216/0.86 = 251.16bhp/ton

EDIT sx beat me to it


Member +
right cheers,

thanks for that, just trying to do some figures for a bit of a mammoth project im planning


Super Moderator
sweet good luck with the project? u going to disclose any of your aims?
i assume that the project is a starlet?


Member +
ye i didnt mean to put 1000kgs, meant that to be with the ton, its too early for me!
thanks for that though


Member +
yes it is with a starlet but somthing a bit different a special, dont want to disclose too many details incase somone else thinks its a good idea and does it!

all i can say is it includes getting another car, making a starlet uber wide, and some serious power...


Member +
Power at Flywheel (BHP) : 160
Weight without Driver (KG) : 750
Power to Weight Ratio (BHP Per Ton) : 216.76
0 - 60 (Secs) : 5.47
0 - 100 (Secs) : 14.01
60 - 100 (Secs) : 8.54
Quarter Mile (Secs) : 13.91
Terminal Speed (MPH) : 99.63
Drag Strip Quarter Mile (Secs) : 13.71
Drag Strip Terminal Speed (MPH) : 101.46

Probably not far off :p