Price changing between order and collection

[Llandudno]

I ordered a new car in May. I agreed a price and signed an order form with the price and left a £1000 deposit. I agreed to take the finance in order to get a deposit contribution. The order was for a 1.4 engine, but I agreed with the salesman to take the 1.5 as the spec was changing.
Anticipated delivery was September, but due to emissions testing, that has moved to December - next week.
I was sent the finance paperwork to sign. The amounts on the fiance paperwork do not match the order form. There is £500 extra. No explanation from the salesman as to why.
When I queried this I was told its because the price has gone up since May and the 1.5 is more expensive than the 1.4

So the car is 3 months late and theyve added £500 without explicitly telling me (hidden in the paperwork, my wife wouldnt have even noticed it)

I will check the small print of the order tonight, but what would you do?

[Alucidnation]

It will all be in the T&C.

Either cancel it or pay it.

It doesn't matter what anyone else would do.

[Nickp82]

Based on the fact that manufacturers often offer price protection when specs or model years change, I would seek to find out if this was available.
The dealer does not sound 100% trustworthy so a call to the manufacturer Head Office is probably where I would start, to find out if the dealer had the option to protect the original price.

[Llandudno]

Checked the T&Cs. No mention of any right to amend the price.

1. THE CONTRACT
"The order for sale of a motor vehicle by us at the agreed price only becomes legally binding after being accepted by xxxxxx"
The order is signed by the business manager.

I guess this makes the agreed price contractually enforceable? There are no other clauses relating to price.

[HTP99]

Problem you have OP is the car ordered technically isn't the car you are now getting; you are getting a revised engine and possibly a differing spec too, however the dealer should have kept you informed as to the changes and any changes in price, keeping quiet on a price increase and hoping you won't notice isn't on.

WLTP is causing a headache to dealers and manufacturers.

[Llandudno]

Agreed.
Just found the clause which allows them to pass on manufacturer price increases by giving me proper notice. I then have 21 days to cancel. They havent given that notice. Unless they count a PCP agreement from vwfs as notice??
Anyway, I now know where I stand. January is a slow month and lots of pre reg Kodiaqs starting to appear.....

[HTP99]

Llandudno said:

Agreed.
Just found the clause which allows them to pass on manufacturer price increases by giving me proper notice. I then have 21 days to cancel. They havent given that notice. Unless they count a PCP agreement from vwfs as notice??
Anyway, I now know where I stand. January is a slow month and lots of pre reg Kodiaqs starting to appear.....

I'm sure, once you start to question it, state your displeasure about the obvious underhand tactics and then mention the "cancel" word, all of a sudden the £500 increase in price will dissappear.