Brake Horse Power ... MMM Missleading term TBH .. Very old school ..

Horse Power .. Unit term to describe power.

Brake Horse power is the Max power an engine can achive.

When an Engine reaches a certian RPM then the inertia of the crank helps the engine to spin. A Resistance Value is subjected onto the engine so momentum doesnt come into it. (I think ) The Max power developed by the actual Combustion bang.

(Just like lifting weights .. Its better to go slow, No momentum to help with the lift)

Thats why Petrol engines tend to have more HP than torque as they can spin like fook.

Diesels spin slower so the BHP reading is down as theres not as much Momentum but the torque is well up as the crank speed is slower over the equivlent piston Linear speed (Up and Down)(If the pistons in a petrol and diesel are going the same speed .. Up & Down the Diesel crank will be spinning slower)

Thats all i know about BHP .. Not really a factor with Big diesel engines.

Fook me .. had a few goes at describing that Two cups of Coffee and 4 Smokes as well ..

TREVCOSSIE: Dont know mate .. .. Iam sure some of the well established Tuners will be right along shortly.