The data indicates that nearly all Vauxhall Insignia Grand Sport (2017-20) 5-door models with the specified description are equipped with a 1.5-liter petrol engine, accounting for 100% of the sample. Additionally, the majority of these vehicles (99.5%) use petrol as their primary fuel, with a very small fraction (0.5%) being gas bi-fuel variants. This suggests that petrol engines are predominantly standard for this vehicle model, with very limited availability of gas bi-fuel options.