@kjohn_18
See here...Car model has no link with date of registration or date of invoice. Ap ne ghalat suna hay or 99% Log dhoka esey he detey hain k Ap ko model woh btatey Hain jab car registered karwatey Hain.....
Model is counted from the date of Manufacturing.
I have experienced such issue happened with me
around 25 years ago...Recently my employee also faced similar issue because he always quoted and told that his model is January 2014 as he registered on 17 January 2014 but at the time of selling, another party cancelled the agreement and demanded Advance back as car model was found to be 2013 (Year of manufacturing). At that time, it was also directed to him to write 2013/14 in such cases that means car is manufactured in 2013 (Model 2013) but registered in 2014.
You can see following of this ethics clearly (by Honest people) in car advertisements published in Jang or Dawn or other newspapers 
Same case as discussed by @hariskhan1989