Power measurements

My son is a big fan of Porsche sports cars, and recently purchased issue 213 of Total 911 (‘GTS vs Rivals’ on the cover), and he found a mistake on page 83, which is the horsepower figure for the 992 Turbo S.

On Porsche’s website the figure is listed as 650PS, while your magazine says 640hp. This is for your kind information.

The 650PS as quoted by Porsche refers to the 992 Turbo S’s metric horsepower. This converts to 640 mechanical horsepower (hp), which is what we at Total 911 like to quote in our power figures to ensure continuity from the measurement style used for classic cars. You’ve raised an interesting issue that could be worthy of a feature: looking at the different power measurements and how they’re calculated.