The most complete car comparison I've found. This review covers several 1907 model year cars, priced from the $500 Ford Model N to the $7500 Westinghouse, and ran in "The Automobile" magazine, December 1906. Unfortunately many makes and models are not included.
This first chart shows among other things, price, weight, horsepower, and rpm (min, max and power rating, the first time I've seen these categories on an early car review):
The body. This shows several features. The Model K is rated seven passenger (the Model K was offered with optional jump seats in some advertising). Body color is also listed as optional:
Engine components, including crankshaft and camshaft specs:
More to follow, including radiator and carburetor brands.