Engine    
320 cu in (5.2 L) Fireball I8

Transmission    
3-speed sliding shift manual
2-speed Dynaflow automatic

Dimensions
Wheelbase    
129.0 in (3,277 mm)
Length    
1942: 217.0 in (5,512 mm)
1946–47: 217.1 in (5,514 mm)
1948: 217.5 in (5,524 mm)
Width    
78.6 in (1,996 mm)
Height    
66.1 in (1,679 mm)
Curb weight    
4,200–4,700 lb (1,900–2,100 kg)

Buick Roadmaster on Wikipedia

MORE SPECS WILL BE HERE SOON