the 503E It has a fuel consumption of 20.9 km/l in the city, while it consumes 21.9 km/l on the highway, and an energy consumption of 0.95 MJ/km.

With a 0 to 100 km/h time of 13.00 seconds, a top speed of 190 km/h, and a weight of 1501 kg, the 503 is equipped with a naturally aspirated V8 gasoline engine.

The engine that powers the 503 It's a 3168 cc V8, with overhead valves. This engine was the same one used in the sedans, but here its power was increased due to the addition of two carburetors and an improved lubrication system using a chain-driven oil pump. With a compression ratio of 7.5:1, the engine produces 140 hp at 4800 rpm, 30 hp more than the sedan engine. Coupled to the engine is a four-speed manual gearbox that sends power to the rear wheels. The front suspension is a double wishbone type with a torsion bar, and the rear is a axle with a torsion bar. Braking is handled by drum brakes on all four wheels, with the option of front disc brakes. The 503 weighs around 1500 kg, enough to reach a top speed of 185 km/h.  

This engine produces a maximum power of 140 hp at 4800 rpm and a maximum torque of 216.0 Nm at 4800 rpm. Power is transmitted to the road via a 4-speed manual gearbox, and the drive type is rear-wheel drive (RWD).