Dimensions: this model outside length is 5692 mm / 224.1 in, it’s 2027 mm / 79.8 in wide and has wheelbase of 3208 mm / 126.3 in. The value of a drag coefficient, estimated by a-c, is Cd = 0.58 .
Reference vehicle weights: shipping weight 2344 kg / 5167 lbs estimated curb weight 2420 kg / 5330 lbs .
Performance: top speed 178 km/h (111 mph) (theoretical); accelerations 0- 60 mph 13.2 s; 0- 100 km/h 14 s (a-c simulation); 1/4 mile drag time (402 m) 19.4 s (a-c simulation).
Cadillac made significant advancements in engineering for 1975, that resulted in an increase in gasoline mileage. Among them, the new catalytic converter, installed on Cadillac for the first time in 1975. This was an important advancement, as it scrubbed engine emissions outside of the engine—allowing the engine itself to be recalibrated for improved efficiency under varied conditions. The High Energy Ignition System introduced last year as an option was made standard for 1975, an important advancement in engine performance, reliability, and length between scheduled service.
Other changes made to improve fuel economy included modifications to the transmission torque converter to make it "tighter" for more immediate, positive response. Lower axle ratios also helped increase mileage, as did steel-belted radial ply tires, which reduced drag up to 33 percent compared to bias-belted tires. This meant less rolling resistance, and better fuel economy.
Cadillac introduced a new, wider radiator for 1975 for better cooling in heavy traffic conditions. New engine mounts also isolated the engine better, to reduce vibration and noise. New stainless steel sandwiched rear brake lines resisted corrosion longer.
The value of buying a new 1975 Cadillac was in its reputation as America's most popular luxury car, the fact that it was constantly being improved, held its value better than many cars, and that of all the Cadillacs built—dating back to 1902—more than 44% were still on the road at that time
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