0frollardBest Answer 6 years ago ReplyUpvote***WARNING***LOTS and LOTS of assumptions in these calculations, but I figure pretty close.250cc engines at 3600rpm put out what I found on the net to be about 7-8hp.on the high side, say 10hp10hp is about 7500 watts.A watt is a joule-second.that's 7500 joules/second, or 450kJ/minuteWikipedia says:"Gasoline contains about 35 MJ/L (9.7 kW·h/L)"and"most engines retain an average efficiency of about 18%-20%"so to output 450kJ/minute the engine has to consume about 2.25MJ of gasoline/minute (wastes 1.8MJ/minute as heat)Gasoline @ 35MJ/L and engine consumes 2.25MJ/m = 35/2.25 = 15.6 minutes/liter or 0.0643 Liters per minute.

0lohithglemonie Answer 6 years ago ReplyUpvoteat RPM of 4000 and the fuel is diesel and it is a four stroke engine

0lemonielohithg Answer 6 years ago ReplyUpvoteIf it's a specific engine could you name it? What I should have thought to ask is "what output horepower?" See, 4000 RPM on "engine only" won't consume the same amount of fuel as 4000 RPM at full load in "drive". L

0lohithglemonie Answer 6 years ago ReplyUpvoteI am not willing to know the fuel consumption of a specified engine but the average consumption of diesel per minute.

0lemonielohithg Answer 6 years ago ReplyUpvoteYou got a good answer from Frollard, I hope that's done for you there. L

0Burf 6 years ago ReplyUpvoteNot enough information:Two stroke or four? 3.5 HP work duty engine or 45 HP motocross screamer?Constant load or variable power output?Fuel type?

0rickharris 6 years ago ReplyUpvoteSo much depends. This isn't really possible to answer.Look up some motor bike fuel figures.

## Discussions

Best Answer 6 years ago

***WARNING***

LOTS and LOTS of assumptions in these calculations, but I figure pretty close.

250cc engines at 3600rpm put out what I found on the net to be about 7-8hp.

on the high side, say 10hp

10hp is about 7500 watts.

A watt is a joule-second.

that's 7500 joules/second, or 450kJ/minute

Wikipedia says:

"Gasoline contains about 35 MJ/L (9.7 kW·h/L)"

and

"most engines retain an average efficiency of about 18%-20%"

so to output 450kJ/minute the engine has to consume about 2.25MJ of gasoline/minute (wastes 1.8MJ/minute as heat)

Gasoline @ 35MJ/L and engine consumes 2.25MJ/m =

35/2.25 = 15.6 minutes/liter or 0.0643 Liters per minute.

6 years ago

At what RPM?

With what fuel?

What type of engine?

L

Answer 6 years ago

at RPM of 4000 and the fuel is diesel and it is a four stroke engine

Answer 6 years ago

If it's a specific engine could you name it?

What I should have thought to ask is "what output horepower?" See, 4000 RPM on "engine only" won't consume the same amount of fuel as 4000 RPM at full load in "drive".

L

Answer 6 years ago

I am not willing to know the fuel consumption of a specified engine but the average consumption of diesel per minute.

Answer 6 years ago

You got a good answer from

Frollard, I hope that's done for you there.L

6 years ago

Not enough information:

Two stroke or four?

3.5 HP work duty engine or 45 HP motocross screamer?

Constant load or variable power output?

Fuel type?

6 years ago

0, when its off.

6 years ago

So much depends. This isn't really possible to answer.

Look up some motor bike fuel figures.