A @BigDave says a lot depends on one financial circumstances at the time. Also interest rate rises will make repayments more on personnel loans for example
I also think a lot depends on the class of vehicle you require and the model trim variant you want I.E a BMW is going to cost more than say a Dacia. Like wise a basic trim will be less than a top of the range trim.
Regarding PCP if we look at the MG ZS one can be add for £185 deposit £185 month albeit for 48months, which leaves you £960 for insurance and maintenance etc.