CO₂ emissions: 14 of 14 variants rated.
Toyota iQ 1.3 VVT-i Dynamic tops the Toyota iQ ranking by CO₂ emissions, at 120 g/km.
Across 14 ranked variants, CO₂ emissions spans from 99 g/km to 120 g/km.
| # | Variant | Year | Body | Fuel | CO₂ emissions |
|---|---|---|---|---|---|
| 1 | Toyota iQ 1.3 VVT-i Dynamic | 2009 | Hatchback | Petrol | 120 g/km |
| 2 | Toyota iQ 1.3 VVT-i Dynamic | 2009 | Hatchback | Petrol | 113 g/km |
| 3 | Toyota iQ 1.0 VVT-i Aspiration Bronze | 2010 | Hatchback | Petrol | 110 g/km |
| 4 | Toyota iQ 1.0 VVT-i Aspiration Pearl | 2010 | Hatchback | Petrol | 110 g/km |
| 5 | Toyota iQ 1.0 VVT-i Comfort | 2009 | Hatchback | Petrol | 110 g/km |
| 6 | Toyota iQ 1.0 VVT-i Aspiration | 2009 | Hatchback | Petrol | 110 g/km |
| 7 | Toyota iQ 1.4 D-4D-F Comfort | 2009 | Hatchback | Diesel | 104 g/km |
| 8 | Toyota iQ 1.4 D-4D-F Aspiration | 2009 | Hatchback | Diesel | 104 g/km |
| 9 | Toyota iQ 1.0 VVT-i Access | 2010 | Hatchback | Petrol | 99 g/km |
| 10 | Toyota iQ 1.0 VVT-i Aspiration Bronze | 2010 | Hatchback | Petrol | 99 g/km |
| 11 | Toyota iQ 1.0 VVT-i Aspiration Pearl | 2010 | Hatchback | Petrol | 99 g/km |
| 12 | Toyota iQ 1.0 VVT-i Comfort | 2009 | Hatchback | Petrol | 99 g/km |
| 13 | Toyota iQ 1.0 VVT-i Black Edition | 2009 | Hatchback | Petrol | 99 g/km |
| 14 | Toyota iQ 1.0 VVT-i Aspiration | 2009 | Hatchback | Petrol | 99 g/km |