Clean Green Cars has conducted a unique research programme into the CO2 performance of every car manufacturer operating in the UK. We did this by taking the official CO2 output of every model and correlating that figure to its sales in both the first quarter of 2007 and the first quarter of 2006. That enabled us to come up with an accurate average figure for every manufacturer by reflecting its sales mix: for example a Focus 1.6 Zetec (159 g/km CO2 and 4402 sales) has a much bigger influence on the overall Ford figure for 2007 than the Focus 2.5 ST2 (224 g/km CO2 and 808 sales).
Manufacturer
CO2 output Q1 2007
CO2 output Q1 2006
improvement
Fiat
141.22
139.54
-1.20%
Peugeot
147.58
150.50
1.94%
Citroen
147.97
148.93
0.64%
Toyota
149.33
158.11
5.55%
Skoda
152.53
152.54
0.01%
Renault
155.30
155.16
-0.09%
Ford
155.48
154.85
-0.41%
Mini
155.63
180.92
13.98%
Seat
156.45
147.08
-6.37%
Vauxhall
156.66
157.91
0.79%
Volkswagen
158.24
154.58
-2.37%
Honda
158.35
157.52
-0.53%
Chevrolet
160.37
162.55
1.34%
Kia
163.49
167.36
2.31%
Hyundai
168.08
173.10
2.90%
Nissan
169.73
168.83
-0.53%
Suzuki
169.95
147.43
-15.28%
Saab
178.75
181.41
1.47%
BMW
183.26
190.85
3.98%
Mazda
183.95
187.02
1.64%
Mitsubishi
186.12
173.98
-6.98%
Audi
186.37
179.16
-4.02%
Volvo
193.71
193.45
-0.13%
Alfa Romeo
195.25
181.57
-7.53%
Lexus
200.70
214.57
6.46%
Mercedes
200.93
195.51
-2.77%
Jaguar
202.89
195.79
-3.63%
Chrysler
222.66
226.41
1.66%
Subaru
232.34
208.74
-11.31%
Land Rover
252.47
262.00
3.64%
Jeep
275.35
277.41
0.74%
Porsche
276.49
274.05
-0.89%
Total Market
165.46
166.00
0.32%
The results might surprise some people: the manufacturer with the lowest average CO2 figure is Fiat, thanks to the large proportion of small cars and diesels that it sells. In joint second place are Peugeot and Citroen, traditionally leaders in diesel technology. In fourth place is Toyota: despite its high profile hybrid Prius, it does not sell enough of them to make a major difference to its corporate average.
