These factors can make some C-Cars a bit faster or slower than others. Approximate top speeds expected with a Citicar on level ground: 36v – to (original SV-36 – six 6v batteries) 48v – to (original SV-48 – eight 6v batteries)   Prior to car #1501, CitiCars left the factory as 36 volt models; most had a 2.5 hp Baldor motor, but a few had the 3.5 hp GE motor. In December 1974, CitiCar number #1501 (124SR1501) was the first factory-built 48 volt CitiCar. These vehicles were designated as model SV-48, compared to the earlier SV-36. All CitiCars made after this vehicle were produced as 48 volt models with the newer 3.5 hp GE series motor. CitiCar #1751 (March 1975) saw a number of changes to the assembly line. Here is a list of changes at car #1751 –  The turn signal switch change required a number of other changes –   In addition, there were a number of technical improvements –  After the changes at car #1751, there was a minor glitch noted in the service manual. Since a lamp was removed from the instrument panel, there were fewer lamps, and the dimmer would not allow the lamps to go all the way off. Before car #2011 (May 1975), the CitiCar had front disc brakes. Cars #2011 and after had drum brakes. On car #2080 (May 1975), the parking brake micro switch was moved to a different position, and was actuated by a plastic collar instead of a detent on the parking brake shaft. On car #2211 (July 1975), a switch was added to the dual master cylinder along with a small PC board behind the dash to warn of problems with brake hydraulics, as well as indicating if the parking brake is engaged. Before #2211, the brake lamp was a parking brake engaged indicator only. Prior to car #2426 (September 1975) the accelerator was returned to off via a single accelerator spring. Sebring-Vanguard issued a Service Note to modify all previous vehicles to add another spring. After #2426, a dual spring accelerator pedal was standard. Around December 1975 there was another major change in the CitiCar assembly line. All CitiCars #2781 and higher were equipped with a 5.17:1 ratio Dana/Spicer rear axle and a 6 hp GE motor.