这家汽车厂今年生产的汽车比去年多两倍

有两种表达方式：
The car production of this manufacturer tripled this year than last year.

The auto manufacturer produced twice more cars this year than last year.

如果说twice as...as则说的是去年的二倍，不是多二倍，多二倍应该是三倍才对

the cars that this factory manufactured are triple than it did last year.

The number of the cars produced by the factory this year is twice as much as the number last year。