4. 1906 Advance Steam Traction Engine
For whatever reason, Leno is a fan of steam engine vehicles. Whether you like them or not, he’ has them. The 1906 Advance Steam Traction Engine is a real marvel of early engineering when steam engines were taking over. Long before the internal combustion engine became the go-to choice for transportation.
But when it comes time to trim that collection down, Leno is going to have to make some sacrifices. The 1906 Advance Steam Traction Engine is just not an everyday car or even one that you come across often at the auction block. There are much better choices Leno could be spending his time on than the steam engine-powered traction mobile.