L-Types and P-Types also had different gearing and power (depending on year, I think it was 84 that the P-Type had more power than the L-Type, with the L-Type getting the same power for 85).
Also, the P-Type had the nice 14x7" wheels, while the L-Type had 13x5.5" or 13x6" can't remember which. Though in 85 the L-Type got nice 15x6" wheels like the P-Type's 14" ones.
There were some other differences too, like interior options, etc, mainly in different years, like leather was only offered in the L-Type for 82, and I think the digital dash started out as only being available for the L-Type as well.
Stuff like that. I prefer the P-Type myself though. The 85-86 P-Type.