En '''rækkemotor-3''',<ref name="Saab96nV4Robson">{{cite book| last = Robson| first = Graham| title = Saab 96 & V4| series = Rally Giants| date = 15. august 2010| publisher = Veloce Publishing| isbn = 978-1-84584-256-7| page = 27| chapter = The car and the team| quote = V4 replaces straight three}}</ref> også kaldet '''inline-triple''',<ref>Let's Ride: Sonny Barger's Guide to Motorcycling. Sonny Barger, Darwin Holmstrom. HarperCollins, 8 Jun 2010</ref><ref>Superbikes: The World's Top Performance Machines. Alan Dowds. Tangerine Press, 2004</ref><ref>Cycle world, Volume 44. CBS Publications, 2005</ref><ref>{{cite journal | last1 = Gorant | first1 = Jim | editor-last = Oldham | editor-first = Joe |date=december 1997 | title = Jet Ski Saviors | journal = [[Popular Mechanics]] | volume = 174 | issue = 12 | pages = 54 –57 | location = New York, NY USA | publisher = Hearst | issn = 0032-4558 | accessdate = 2012-07-02 | url = https://books.google.com.jm/books?id=MGYEAAAAMBAJ&dq=Inline+Triple+Popular+Mechanics&source=gbs_navlinks_s | quote = The 1071cc, inline, triple-cylinder configuration produces 803 pounds of thrust and pushes the boat to about 55&nbsp;mph.}}</ref> eller '''inline-three''' på engelsk<ref name="RnT3x3July93">{{cite journal | editor-last = Dinkel | editor-first = John |date=juli 1988 | title = Comparison Road Test: 3x3 | url = https://archive.org/details/sim_road-track_1988-07_39_11/page/66 | journal = [[Road & Track]] | volume = 39 | issue = 11 | pages = 66 –74 | location = Newport Beach, CA USA | publisher = Diamandis Communications | issn = 0035-7189 | quote = Its engine is still the same 993-cc sohc inline-3, producing 48&nbsp;bhp at 5100&nbsp;5100 rpm and 57&nbsp;lb-ft torque at 3200...}}</ref><ref>{{cite journal | last1 = Mayersohn | first1 = Norman | last2 = Zino | first2 = Ken | editor-last = Oldham | editor-first = Joe |date=marts 1988 | title = Car of the Future Part 3 of a Series  – Power for Tomorrow | journal = Popular Mechanics | volume = 165 | issue = 3 | pages = 53 –57 | location = New York, NY USA | publisher = Hearst | issn = 0032-4558  | accessdate = 2012-07-02 | url = https://books.google.com.jm/books?id=ZeQDAAAAMBAJ&pg=PA53&source=gbs_toc_r&cad=2#v=onepage&q&f=false | quote = Under a more sophisticated modular engine plan, a basic 3-liter V6 could be split into an inline Three, chopped into a V4 or melded into a V12.}}</ref> (forkortet '''I3''' eller '''L3'''), er en [[Stempelmaskine|stempel]]-[[forbrændingsmotor]] med 3 [[Cylinder (motordel)|cylindere]] der er arrangeret i en lige linje eller række ved siden af hinanden
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