Styling changes for 1975 brought dual, square headlight lenses flanked by rectangular cornering lights wrapping around the body. A new cross hatched grille appeared. Calais Coupes and Sedans had triangular "coach" windows. Standard equipment was about the same as in 1974, plus front fender lamp monitors; power door locks; high-energy ignition; steel-belted radial tires and catalytic converter. Once again, substantial mid-year price increases were seen. Also, all cars offered at the beginning of the model run were equipped with 500 cubic inch V-8s and electronic fuel injection became optional in March, 1975.
| Model | Body/style Number | Body Type | Seating | Price | Weight | Production total |
|---|---|---|---|---|---|---|
| 6C | C47/G |
2-door Hardtop Calais Coupe | 6 pass | $8184 | 5003 | 5,800 |
| 6C | C49/N |
4-door Hardtop Calais Sedan | 6 pass | $8377 | 5087 | 2,500 |
| Description | Standard Engine | Eldorado Engine | Seville |
| Engine type | V-8 Overhead valves. Cast iron block | ||
| Main bearings | Five | ||
| Valve lifters | Hydraulic | ||
| Displacement | 500 cubic inches (7.7 litres) | 500 cubic inches (8.2 litres) | 350 cubic inches (5.7 liters) |
| Bore and stroke | 4.300 x 4.304 in. (109 x 103 mm) | 4.300 x 4.304 in. (109 x 109.3 mm) | 4.057 x 3.385 in. (103 x 86 mm) |
| Compression ratio | 8.25:1 | 8.25:1 | 8.0:1 |
| Brake horsepower (net SAE) | 210 @ 3600 rpm | 210 @ 3600 rpm | 180 @ 4400 rpm |
| Torque | 380 ft. lbs. @ 2000 rpm | 380 ft. lbs. @ 2000 rpm | 275 ft. lbs. @ 2000 rpm |
| Oil pressure | 35 psi | 35 psi | 35 psi |
| Carburetor | Rochester four-barrel Quadrajet Model 4MV | ||
| Model | Wheelbase | Overall length | Width | Tires |
|---|---|---|---|---|
| Seville | 114.3 in | 204 in | 72 inches | GR78 x 15B |
| Brougham | 133 in | 234 in | 80 inches | L78 x 15/B white sidewall bias belted |
| Eldorado | 126.3 | 225 in | ||
| Commercial chassis | 157.5 in | - | L-78 x 15/B black sidewall bias belted | |
| Seventy-Five | 151.5 in | 253 in | ||
| All others | 130 in | 231 in |
1974