This mod is meant to be used alongside the Realistic Driving Mod, however it is not necessary,

Realistic Driving Mod:
https://www.gta5-hub.com/vehicles/realistic-driving-v

Alfa Romeo Montreal 105 GT: https://www.gta5-hub.com/vehicles/alfa-romeo-montreal-105-gt

- Installation guide in readme text file.

This mod gives the vehicle it's actual weight, transmission, top speed, monetary value and other specifications.
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Changelog:
1.0 - Initial Release
2..0 - Edited the vehicle's sound