Cars by family and model year

Chevrolet's new 265 V8 and the RPO 410 power package put real performance in an ordinary showroom, and the factory published two different ratings for the same engine.

A 331-cubic-inch FirePower V8, 300 advertised horsepower, and heavy-duty chassis equipment made the 300 a showroom argument that Carl Kiekhaefer's racing team then made in public.

The Twin H-Power Hornet that American Motors sold in 1955 shared its name with the most successful stock cars in early NASCAR — and almost nothing else about its situation.

Chevrolet's new intermediate could be ordered with a 327 in two documented power teams, which is why the mid-size performance story was never only a Pontiac one.

Dodge sold the Polara 500 with a 383 or a single-four-barrel 426, closely mirroring Plymouth's catalog — which is itself evidence about how 1964 street performance was marketed.

Two advertised 427s, 410 and 425 horsepower, in a full-size body — Ford's answer was size and cubic inches while Pontiac was busy redefining the question.

A 383 or a street 426 Commando behind a Hurst shifter, from the division whose race Hemi swept Daytona the same season and belongs in an entirely separate record.

An option package on a mid-size Tempest, sold past a corporate racing ban by people who understood advertising as well as engineering — and the car the rest of Detroit spent the year answering.

The first Camaro became a configurable performance car whose SS badge only begins the L35, L78, transmission, and Z/28 story.

The 1967 redesign made room for the 390 while Ford’s option logic kept GT, GTA, engine, and transmission choices meaningfully separate.

Three 400s separated by twenty advertised horsepower, and a Judge package loud enough that people still remember the stripes better than the engine codes.