The British Whippet Mark A tank was faster, lighter, and cheaper even though it had two engines. It was used for fast assaults to exploit gaps between the larger slower tanks.It was armed with four Hotchkiss machine guns, one pointing in each direction.
During the Spring Offensive of 1918 seven Whippets wiped out two entire German infantry battalions. After the war Whippets were used in Ireland in the Anglo-Irish war and also in Russia and Japan.
This quality Reviresco 1/72 metal kit would be a interesting addition to any tank collection.
See it at:
http://www.tin-soldier.com/tanks.html