Brian's already listed a few major concerns, like weight capacity of the bearings and structure.
Those brakes are too tiny for a LR and would never pass an inspection/stopping_test at motorway speeds.
When the Chinese say "car", they refer to golf carts and NEVs. 10-20mph stuff for old people in resorts or for use inside factories.
That 8kW is peak motor power, and they usually round UP optimistically in my observation...I'm guessing you'd be lucky to see 2kW continuous from an air cooled hub motor like those, if even that much from them, and with their amateur-hour direct connection of brake rotors to the motor case, you might completely shut the motor down after one high speed stop on a full battery (no regen possible) due to motor overheat.
Use of these motors is epic fail in the making, imo, but if you do decide to proceed, please report the build and testing results here. I love being corrected or put in my place with facts...part of learning. Call me arrogant, but I seriously doubt this will get you on a motorway and your range will be limited by motor overheat to maybe getting around the block.