How much do things cost in Porto and London? London is 69% more expensive than Porto London Porto Meal for 2, Mid-range Restaurant, Three-course£50.00£24.72 1 Summer Dress in a Chain Store (Zara, H&M, ...)£31.06£25.55 Water (0.33 litre bottle) £0.96£0.72 Domestic Beer (0.5 litre bottle)£1.51£0.77 Last updated on 05/03/2014 source