there is NO doubt interest is haram, but a more debatable topic is whether leasing things is haram or not. cuz Islam does provide a provision of buying something on intallments, and at a price more than the market price. the best policy to use is "when in doubt, dont". so if u are in doubt whether u should go for a lease or financing, then dont do it. ud be safe that way.
btw, i like the opening line of this thread:
"Hello friends. i am looking to buy a 1300cc or more or less cc car..."!!!
u r looking to buy either a 1) 1300cc car, or 2) more than 1300cc car, or 3) less than 1300cc car!
u've covered every car under the sky, in ur options! lol.