.. was it a lorry? Or do you mean adjusted for inflation?
Average petrol price in 1990 was around £1.90. Per gallon. 45p per litre. 150l doesn’t sound right for the average car?
Prior: SEAT Ateca Xcellence Lux 1.5 TSI DSG MY19, VW Golf GTE PHEV DSG MY23
Current: Hyundai Ioniq 6 Ultimate
Next: we'll see what's available in 2028.