The 1976 Seville cost plenty, more than any Cadillac model except for the Fleetwood Seventy-Five. Its $12,479 price tag (about $56,500 in 2018 dollars) was fully triple that of the top-of-the-line Chevy Nova: $4,134 for a Nova Concours hatchback. Meanwhile, a new Mercedes-Benz 280S (the predecessor to today's E-Class) listed at $15,057 that year.
The Seville came with luxury options no Nova owner even imagined, such as thermostat-controlled HVAC and Cadillac crests on the dash switches. The fake wood, however, seemed quite Nova-ish.
Still, these cars were quite comfortable, though you had to pay extra for genuine leather interior. I used to daily-drive a 1976 Nova, and the ride wasn't too bad; the Seville had extra subframe mounts and much higher attention to build quality. It didn't ride as nicely as a 1976 Sedan DeVille, but few cars did.
Starting in 1978, a miserable Oldsmobile diesel V8 was an option, but the only engine available in the '76 Seville was this fuel-injected 350-cubic-inch Oldsmobile gasoline V8 rated at 180 horsepower. Naturally, no manual transmission was available.
The less said about "wire wheel" hubcaps, the better. At least it's not a Cimarron.
Here's a dealership film showing some of the engineering marvels in the new Cadillac.