Sometimes, the biggest discount isn't the most eye-catching – £10,000 off a car that costs £50,000 isn't as helpful to the average buyer as £3000 off one that starts at £18,000.
It is the second sort of deal that we've found several of this week – ones that represent useful and sizeable reductions on everyday family vehicles.
The cars with these big discounts are from volume manufacturers Citroen, Ford and Hyundai.
The Citroen C3 Picasso 1.6 HDi VTR is a four-star car, and the deal can be found on Carfile.net, which has whipped a massive £5580 from the list price, taking it down to £10,650.
The second massive percentage saving is on another small MPV, but one that takes a slightly different approach to the C3 Picasso, because the Ford B-Max uses sliding doors to boost its practicality.
The model B-Max in this week's deals has the 1.0-litre Ecoboost petrol engine, and comes with Titanium trim.
Our researchers have found £3438 off the list price, making this well-equipped small MPV cost just £13,157.
The Hyundai i30 that features is not just any i30, it's our pick of the range, the 1.6 CRDi 110 Blue Drive Active 5dr. Thanks to Drivethedeal.com you can buy it for £15,215, a £3380 saving.
All of these deals feature in our weekly round-up, along with many more eye-catching discounts. The biggest monetary saving this week comes courtesy of BMW. The 530d M Sport saloon is the model, and it has a £9224 saving, making it £34,646. See what other savings you can get here.