In 1896, Karl Benz was granted a patent for his design of the first engine with horizontally-opposed pistons
If you mean who made the first combustion engine, i have no idea, but the first Four-Stroke engine was made by Nikolaus Otto.
Milan, NH, and just saying "Who made this first engine" Easy, Karl Benz, In the date of 1896.
It was first made in Dublin, Georgia.
1876
jet metel
Wood and fabric.
Milan, NH
Rudolf Diesel
bob the builder
1957
The first motorcycle was made in the US by Sylvester Howard Roper (1823-1896), who invented a two-cylinder, steam-engine motorcycle (powered by coal) in 1867. Or - in terms of the internal combustion engine, the first motorcycle was made by Gottlieb Daimler, who in 1885, attached an engine to a wooden bike.
Paul Paterson