Don't know if the Artus V12[1] is smaller but it's an actual combustion engine not an air pressure driven model of a combustion engine. In that category it mig

Don't know if the Artus V12[1] is smaller but it's an actual combustion engine not an air pressure driven model of a combustion engine. In that category it might be even still bigger than a pneumatic LEGO engine[2], but still an incredible feat in craftsmanship. [1] http://www.artus-motor.com/artus-v12-motor/ http://www.artus-motor.com/artus-v12-motor/ [2] https://www.youtube.com/watch?v=5bKIdqh6ARA https://www.youtube.com/watch?v=5bKIdqh6ARA