Interior is plush, fully carpeted and trimmed, beautifully done dashboard, wood steering wheel, modern stereo,CD with USB input under the dash . New seat belts, new tonneau, new top, excellent side curtains, and a powerful and effective heater. Have driven it in 20 degree weather and have been comfy ,cozy. Engine.. bored out 1275 to 1312cc, Cooper S higher compression pistons , balanced, large baffled competition oil sump, vernier timing gears, gas flowed aluminum head, roller rockers, twin SUs, headers, electronic ignition, high performance clutch.