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Hagerty Employee

The basics of Bonneville Speed Week engine classes

If you’ve ever seen a land speed race car, you may have been intrigued by its bizarre proportions, flattened roof, and strange lettering. The first two, naturally, are the product of being modified for high speeds, and we’ll investigate those design elements in a future article. The lettering on each race car that plies the salt at Bonneville refers to its engine displacement, whether or not it’s supercharged, the fuel it burns, and its car class, in that order, as specified by the Southern California Timing Association.


We’ll take you through the first bit of those confusing alphanumeric codes right now.


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