On September 20, 1928, 11 AM, a new five-seater Ford Tudor Sedan Model A, left the starting point of Zurich with two drivers, after the bonnet was sealed by the municipal office. After passing Lucerne, the car crossed the Grimsel Pass (7139 ft) and passed the Furkapass with an altitude of 7975 ft above sea level. The route then passed the St. Gotthard Pass (6929 ft) and then down to the Italian lakes. The car passed all the great cities of Switzerland and returned to Zurich on September 26, 1928, two o'clock in the afternoon, with sealed seals and after running constantly for 147 hours. This was done to prove the reliability of the Ford Model A.
The only limit is the spine and of course the gasifier should be correctly designed.