UK Family Car Index

Boot space is the segment

Median seats-up VDA capacity by size segment. The gap between a supermini and an estate is the whole argument: a second child seat costs nothing in litres, but the buggy and the weekly shop do.

MPV

660 L · n=39

Seven-seat SUV

658 L · n=33

Estate

565 L · n=47

Large SUV

550 L · n=30

Large saloon

520 L · n=15

Saloon

480 L · n=4

Mid-size SUV

472 L · n=57

Small SUV

405 L · n=31

Family hatchback

385 L · n=41

Supermini

320 L · n=44

City car

252 L · n=8

The frunk, kept separate

Where the motor sits at the back, the space under the bonnet becomes a cubby. 22 of the 89 electric or electric-capable generations here have one; 63 are confirmed to have none — Volkswagen's MEB cars and the Stellantis small-car platforms fill the space with hardware. It is recorded for reference and nothing more: a frunk is never added to the boot figure and never affects the score. It holds charging cables and a warning triangle, not a buggy.

Mercedes-Benz GLB

127 L · boot 480 L

Tesla Model Y

117 L · boot 854 L

Mercedes-Benz CLA

101 L · boot 405 L

Mercedes-Benz CLA Shooting Brake

101 L · boot 455 L

Kia EV9

90 L · boot 828 L

Hyundai Ioniq 9

88 L · boot 908 L

Tesla Model 3

88 L · boot 594 L

Ford Mustang Mach-E

81 L · boot 402 L

Audi Q6 e-tron

64 L · boot 526 L

Hyundai Ioniq 5

57 L · boot 520 L

Kia EV6

52 L · boot 490 L

Volvo EX90

46 L · boot 655 L

Hyundai Ioniq 6

45 L · boot 401 L

Ford Puma

43 L · boot 456 L

Polestar 2

41 L · boot 407 L

Dacia Spring

35 L · boot 308 L

Polestar 3

32 L · boot 484 L

Volvo XC40

31 L · boot 443 L

Hyundai Kona

27 L · boot 466 L

Kia EV3

25 L · boot 460 L

Kia Niro

20 L · boot 451 L

Volvo EX30

7 L · boot 318 L

The index

Filter and sort, then open any row for the full evidence — dimensions, ISOFIX detail, Euro NCAP, the honest verdict, and the sources every figure came from.

Min boot 0 L

Car	Years	Segment	Boot	Seats	ISOFIX	NCAP	Score	Family fit
Loading 350 model generations…

How a car is classified

The gate: is it a family car?

A pass/fail test on evidence, not a matter of degree.

Four or more doors
Five or more seats
Two rear ISOFIX positions, where the figure is known
A boot of at least 300 litres, where the figure is known

An unknown never fails a car. It is recorded as unknown and flagged on the row.

The score: how good a one?

100 points, computed identically for every record.

35 — boot, seats up
25 — child-seat access: doors, ISOFIX, three-across
20 — Euro NCAP stars and child-occupant score
12 — cabin size, proxied by length
8 — flexibility: third row, sliding bench, towing

An electric car's front boot is recorded but contributes nothing. It is not added to the boot figure and not scored.

Read the numbers carefully

Van-derived people carriers are quoted by their makers to the roof, not to the parcel shelf. Their litres are not comparable with a car's VDA figure.
A five-star 2014 Euro NCAP result is a weaker car than a five-star 2023 one. The test year is on every record.
Hybrid and plug-in versions often lose boot space to the battery. Where they do, the row says so.