HWM 51

{{Infobox racing car

| Name = HWM 51{{cite web|url=http://www.dlg.speedfreaks.org/archive/cars/hwm/autos/2439.php|title=HWM 51-Alta|access-date=15 October 2022}}

| Image =

| Category = Voiturette/Formula One

| Constructor = HWM

| Chassis = Steel tubular spaceframe

| Front suspension = Double wishbones, coil springs over shock absorbers, anti-roll bar

| Rear suspension = Leaf springs, de Dion rear axle

| Wheelbase =

| Track =

| Engine name =

| Capacity = {{convert|2.0|L|cuin|1|abbr=on}}

| Configuration = Alta L4

| Turbo/NA = naturally-aspirated

| Engine position = mid-engined

| Power = {{cvt|145|hp|kW}}

| Gearbox name =

| Gears =

| Type = manual

| Weight =

| Brakes = Disc brakes

| Tires = Dunlop

}}

The HWM 51 was an open-wheel race car, designed by Briton John Heath, and developed and built by HWM (Hersham and Walton Motors), in 1951.{{Cite web|url=https://autosportworld.info/en/cars/hwm-51-alta-l4-c-15/|title=Find out all the information about the race car HWM 51 (Alta L4 c 1.5). As well as its drivers and results.|first=Auto Sport|last=World|website=Auto Sport World}} It competed in voiturette racing events, as well as two Formula One World Championship Grand Prix events; the 1951 Swiss Grand Prix, and the 1952 Belgian Grand Prix.{{Cite web|url=https://www.statsf1.com/en/hwm-51.aspx|title=HWM 51 • STATS F1|website=www.statsf1.com}}{{Cite web|url=https://www.conceptcarz.com/view/f1/teamsBySeason.aspx?driverID=35&driverTeamArticleID=14|title=HW Motors: 1951 Formula One Season Formula 1|website=conceptcarz.com}}