This nice-looking and compact 2.47 cc diesel was manufactured in 1960-61 in very small numbers in the Netherlands by a company named “Thuella Miniatuur Motoren”. The designer was a then well-known Dutch modeller of the day named J. Brinkman of the Dutch university city of Leiden. The company's stated address was Koniginnenlaan 67 in Leiden.

The Favoriet was a somewhat unusual design in several respects. It used the sawn-port reverse flow scavenging system which was falling out of favour by 1960. It also featured a single ball race supporting the rear of the crankshaft. Induction was through a flutter valve somewhat reminiscent of that used earlier in the 1956 FROG 149 Vibramatic. The backplate could be installed either vertically or horizontally to allow the engine to be beam or radially mounted.

The Favoriet was extremely well-made and developed a useful sports output of a claimed 0.26 BHP @ 13,000 rpm. However, it was no match for the majority of 2.5 cc diesels which were then available, including its main domestic competitor, the excellent Typhoon R250 from nearby Amsterdam. As a result, it failed to attract much market attention. Only some 105 examples were manufactured before production ceased in 1961. The Favoriet is consequently a very rare engine today.

A few additional engines were later completed by Mike Crisp in England using original left-over components acquired by well-known Dutch enthusiast Tom ten Brink. Mike's efforts brought the total number ever made to 105. A full review and test of this interesting motor appears elsewhere on this website.