Without going into details as we will further describe year by year the power and characteristics of Bay-Window engines, we will however note the famous 1584 cm2 of 47 hp (at 4000 revolutions). Like on all Type 3, 2 additional engine holders are situated at the rear. These engines have the same cooling system as the Beetle. The crank shaft is more solid and the heads are of simple admission. The pistons are flat or concave in order to develop low compressions. The carburettors are of Solex brand 30 pict 1, 30 pict 2, 30 pict 3 or 34 pict 3 with a by-pass. Each model of carburettor indeed corresponds to a specific market at a specific moment ! It is all depending on stocks available and climates ! For the problem of carburettor freeze, a valve is situated in the air-filter itself connected to a thermostat by a cable. Thus, when the valve is closed, the air comes from the right-handside heating box to the carburettor. In 1973, very few novelties and the Type 4 engine of 1700 cm3 will have difficulties to remain on the catalog. However, the utility Bus is given for an acceleration (half-full) from 0 to 80 km/h in 16,4 seconds. The gas tank contains 55 liters, although 60 liters are officially announced. The official maximum speed is 105 km/hour with an engine of 47 hp, but can be exceeded according to the drivers. As for gas consumption, it is given at 10,4 L/100 km. The running-in is given for 16 000 km. Finally, as for performances themselves, the Bay-Window is quite correct, for instance for its road-holding quality. Suspensions are much more flexible. Its length is increased compared to the Split Bus. It passes to 4420 mm for all the models. All these infos provide from the issues number 128 and number 138 of Super VW Magazine . These back issues are still available at the supervwshop.