British Rail Class 107

{{Short description|Diesel Multiple Unit used in Scotland}}

{{Use dmy dates|date=March 2017}}

{{Use British English|date=March 2017}}

{{More footnotes|date=May 2009}}

{{Infobox train

| background = #0033cc;color:white

| name = British Rail Class 107
(Derby short heavyweight)

| image = File:107444 at Prestwick.jpg

| imagealt = Diesel train in station

| imagesize =

| caption = 107444 in Strathclyde livery at Prestwick

| interiorimage =

| interiorimagealt =

| interiorcaption =

| service = 1960–1991

| manufacturer = BR Derby Works

| factory = Derby Works

| family = First generation

| replaced = Steam locomotives and carriages

| yearconstruction = 1960

| yearservice =

| refurbishment =

| yearscrapped =

| numberconstruction=

| numberbuilt = 26 sets (78 cars)

| numberservice =

| numberpreserved =

| numberscrapped =

| formation = 3-car sets: {{abbr|DMBS|Driving Motor Brake Second}}-{{abbr|TSL|Trailer Second with lavatory}}-{{abbr|DMCL|Driving Motor Composite with lavatory}}

| fleetnumbers =

| capacity = DMBS: 52 second-class
TSL:71 second-class
DMCL: 12 first-class, 53 second-class

| operator = British Rail

| depots =

| lines =

| carbody =

| trainlength =

| carlength = {{convert|58|ft|1|in|m|2|abbr=on}}

| width = {{convert|9|ft|3|in|m|2|abbr=on}}

| height = {{convert|12|ft|4|in|m|2|abbr=on}}

| floorheight =

| platformheight =

| entrylevelorstep =

| art-sections =

| doors =

| maxspeed = {{convert|70|mph|km/h|0|abbr=on}}

| weight = DMBS: {{convert|35.0|t}}
TCL: {{convert|28.5|t}}
DMCL: {{convert|35.5|t}}

| acceleration =

| deceleration =

| traction =

| engine = Two BUT 6-cylinder diesels per power car

| poweroutput = {{convert|600|bhp|kW|0|abbr=on}} per set,
{{convert|300|bhp|kW|0|abbr=on}} per power car,
{{convert|150|bhp|kW|0|abbr=on}} per engine

| transmission = Mechanical: 4-speed epicyclic gearbox

| aux =

| powersupply =

| hvac =

| uicclass =

| bogies =

| brakes =

| safety = AWS

| coupling = Screw-link, British Standard gangways

| multipleworking = ■ Blue Square

| gauge = {{RailGauge|sg}}

}}

The British Rail Class 107 diesel multiple units were built by the Derby Works of British Railways and were introduced in 1960. The class looked similar to the later Class 108 units, but were heavier, being built from steel.