Hey all,

I just got my first Z car over the last few days, a '74 260.

Surfing the 'net for the past few weeks, I always saw the horsepower figure for the 260 as "139hp". However, on my engine compartment plaque it says "162hp". In the Haynes manual, it says something like 165hp, I think.

What's with the discrepancies?

Thanks,

Ayan

Ayan,

Welcome to the world of those who love Zs! One of the benefits of being in this world is something you have just found. There is a lot of seemingly contradictory information about our cars. The primary difference between the three horsepower ratings is the difference in how they were measured. Both are correct. The larger of the numbers was measured the old way, with the engine running with no accessories mounted-no exhaust. The smaller of the two numbers is the Horspower rating as the engine is sold in the car. The former is called "gross horsepower, and the latter is "net horsepower". Both measurements are correct for the engine, but under different circumstances.

This club will be a great source of information, humor, and alternative views on every aspect of your car. Enjoy the ride!

Will