Table 3.

Results of multiple linear regression for WLTP CO₂ emissions. The overall regression was statistically significant (R² = 0.8857, F = 276.9, p < 0.0001).

	Coefficient	95% CI	p-Value
WLTP test mass (kg)	0.1028	0.090, 0.116	<0.001
Engine capacity (cm3)	0.0198	0.015, 0.025	<0.001
Wheelbase (mm)	−0.0793	−0.10, −0.582	<0.001
Fuel type (1 = Diesel, 0 = Petrol)	−24.366	−29.92, −18.81	<0.001
Constant	181.546	137.7, 225.4	<0.001