Baseline (Widescreen) Solution & Issues
Lego Racers works in stretch mode via a command line switch:
legoracers.exe -horzres X -vertres Y
I tested it at 1680x1050. Menus are to the NW corner with a black border, whereas in-game view is true (stretched) 1680x1050.
Ultra/Super-Wide (21:9/32:9) Specific Solution & Issues
Eyefinity / Surround Specific Solution & Issues
4k UHD Specific Solution & Issues