Registered new in Europe in 2021
The largest markets were France (28,375), Italy (4,770), Germany (4,394).
- Average mass
- 1,387 kg
- Average CO₂
- 127 g/km (WLTP)
- Average power
- 95 kW
- Fuel type recorded
- Petrol 54% · Diesel 46%
European Environment Agency, CO₂ emissions from new passenger cars · averages weighted by registrations; CO₂ is the type-approval value; fuel type as recorded at registration, where many non-plug-in hybrids appear as petrol · re-use permitted with acknowledgement
Real-world fuel consumption
6,867 Citroen C4 cars first registered in Europe in 2021 report their fuel use through the on-board meter. Diesel versions use 5.5 l/100 km on the road against 4.7 in the WLTP test (+16%).
| Fuel | Cars | On the road | WLTP | Difference |
|---|---|---|---|---|
| Petrol | 3,336 | 6.6 | 5.7 | +17% |
| Diesel | 3,531 | 5.5 | 4.7 | +16% |
Litres per 100 km from the cars' own fuel meters (OBFCM), collected in 2024; the year is the year of first registration. All years together · European Environment Agency · CC BY 4.0
Engines
The most common engines in 2021 Citroen C4 cars on Dutch roads are the 1.2 petrol (96 kW, 129 hp), 1.2 petrol (74 kW, 99 hp) and 1.2 petrol (114 kW, 153 hp), out of 4 versions with at least 20 cars.
| Engine | Power | Cars |
|---|---|---|
| 1.2 petrol | 96 kW 129 hp | 1,446 |
| 1.2 petrol | 74 kW 99 hp | 59 |
| 1.2 petrol | 114 kW 153 hp | 50 |
| 1.5 diesel | 96 kW 129 hp | 46 |
RDW Open Data (CC0): registered passenger cars and their fuel data · engine size rounded to 0.1 litre, net maximum power · versions with at least 20 cars
Other years
New registrations in Europe by year (European Environment Agency) · a year gets its own page when at least three European sources cover it
In the Netherlands
1,609 first registered in 2021 are on Dutch roads; 26% arrived later as imports. Median list price when new: €31,900.
Most common APK defects
- Bandenspanning niet op juiste waarde424
- Band onvoldoende profiel160
- Dimlicht onjuist afgesteld128
- Ruitenwisserinstallatie geeft onvoldoende zicht114
- Band(en) aanwezig met een profieldiepte van 1,6 t/m 2,5 mm81
- Band beschadigd41
- Kentekenplaatverlichting werkt niet (goed) / ontbreekt27
- Mechanische delen van het remsysteem vertonen slijtage24
Colours
RDW Open Data: registered vehicles and APK defects (CC0) · defect descriptions in the RDW's Dutch wording
In the United Kingdom
6,401 cars built in 2021 were licensed for the road at the end of 2025, and 56 more were declared off the road (SORN).
Department for Transport and DVLA, vehicle licensing statistics (table VEH0124, year of manufacture) · Open Government Licence v3.0
MOT test results in Great Britain
In 2023, 206 of these cars first registered in 2021 took their annual MOT test. 90% passed first time; among all cars first registered in 2021 the figure was 91%.
| Failed on | These cars | All cars from 2021 |
|---|---|---|
| Visibility | 6.8% | 1.6% |
| Suspension | 1.9% | 0.6% |
| Tyres | 1.5% | 3.3% |
| Seat belts and supplementary restraint systems | 1.0% | 0.3% |
| Brakes | 0.5% | 1.3% |
DVSA anonymised MOT tests and results, 2023 (Department for Transport) · Open Government Licence v3.0 · first tests only; a fix made at the test station within the hour still counts as a fail
In Finland
342 of these cars first registered in 2021 were in use in Finland on 30 Jun 2026, with an average of 58,000 km on the odometer at their last inspection.
Traficom (Finnish Transport and Communications Agency), open data on vehicles in use · CC BY 4.0
In New Zealand
26 2021 cars are on the New Zealand register; 4% arrived as used imports, 96% were sold new in New Zealand.
NZ Transport Agency Waka Kotahi, Motor Vehicle Register (March 2026) · CC BY 4.0