You just have ubb tags before/after your whole table like code and /code but with brackets around them (just like the quote tag) that give you a monospace font and spaces and tabs are maintained.
Then you can do what i did there and paste data straight from Excel/LibreOffice and it will come out as a table. Likewise copying a web table should go right in as a table too.
Code:
Vehicle Tesla Chevy Bolt Nissan Leaf
Capacity 85 kWh 60 kWh 40 kWh
HP hours 3,740 2,640 1,760
Weight 1,200 959 560
Lbs HP Hr 10.52 11.92 11.06
HP hr/lb 3.125 2.75 3.14
Range 265 239 150
HP hr/mi 14.11 11.04 11.73
Cost per mi 4.36 3.34 3.35
The only problem you'll run into is if a column has values that exceed the tab stop, data will run into the next column and things will get shuffled, as above.