The chassis was fitted with a 30 hp 4.4-litre four-cylinder engine and had a three-speed chain gearbox and multiplate clutch.

[1] Outside of London, six K-types were sold to Torquay Tramways for feeder services to tram routes.

This company also received transfers of the type from LGOC in order to operate services in Kent and Surrey on its behalf.

The K-type, together with the larger S-type and more advanced NS-type, remained the standard London bus until 1930, when the introduction of the LT and ST types began.

Today, K424 remains preserved at the London Transport Museum, and still appears at rallies and special events.

The T-type was essentially an AEC K-type stretched in length by 2 ft 3 in (0.69 m), with the front axle moved rearward.