Flathead engine

en

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Flathead engine

Quality:

Flathead engine - a type of four-stroke engine. Article “Flathead engine” in English Wikipedia has 58.9 points for quality (as of July 1, 2026). The article contains 27 references and 10 sections.

In this language version of Wikipedia the article has the best quality. Also, this article is the most popular in that (English) language version.

Since the creation of article “Flathead engine”, its content was written by 130 registered users of English Wikipedia and edited by 379 registered Wikipedia users in all languages.

The article is cited 752 times in English Wikipedia and cited 4306 times in all languages.

The highest Authors Interest rank from 2001:

  • Local (English): #37441 in February 2016
  • Global: #42087 in September 2007

The highest popularity rank from 2008:

  • Local (English): #33457 in May 2011
  • Global: #50932 in May 2011

There are 17 language versions for this article in the WikiRank database (of the considered 55 Wikipedia language editions).

The quality and popularity assessment was based on Wikipédia dumps from July 1, 2026 (including revision history and pageviews for previous years).

The table below shows the language versions of the article with the highest quality.

Languages with the highest quality

#LanguageQuality gradeQuality score
1English (en)
Flathead engine
58.8788
2Catalan (ca)
Motor SV
55.8853
3French (fr)
Moteur à soupapes latérales
53.1073
4Spanish (es)
Motor SV
51.5839
5Ukrainian (uk)
Двигун з плоскою головкою
42.9501
6Finnish (fi)
Sivuventtiilimoottori
40.9463
7Portuguese (pt)
Motor de válvulas laterais
39.561
8Persian (fa)
موتور سر تخت
28.6643
9German (de)
SV-Ventilsteuerung
20.4436
10Japanese (ja)
サイドバルブ
19.8568
More...

The following table shows the most popular language versions of the article.

Most popular in all the time

The most popular language versions of the article "Flathead engine" in all the time
#LanguagePopularity awardRelative popularity
1English (en)
Flathead engine
1 607 111
2Japanese (ja)
サイドバルブ
320 101
3Polish (pl)
Silnik dolnozaworowy
285 763
4German (de)
SV-Ventilsteuerung
252 203
5Spanish (es)
Motor SV
104 191
6French (fr)
Moteur à soupapes latérales
73 897
7Dutch (nl)
Zijklepmotor
67 391
8Italian (it)
Valvole laterali
53 396
9Czech (cs)
Side Valves
32 888
10Swedish (sv)
Sidventilsmotor
30 712
More...

The following table shows the language versions of the article with the highest popularity in the last month.

Most popular in June 2026

The most popular language versions of the article "Flathead engine" in June 2026
#LanguagePopularity awardRelative popularity
1English (en)
Flathead engine
4 234
2Japanese (ja)
サイドバルブ
712
3German (de)
SV-Ventilsteuerung
672
4Polish (pl)
Silnik dolnozaworowy
562
5French (fr)
Moteur à soupapes latérales
228
6Spanish (es)
Motor SV
147
7Czech (cs)
Side Valves
113
8Finnish (fi)
Sivuventtiilimoottori
98
9Swedish (sv)
Sidventilsmotor
96
10Italian (it)
Valvole laterali
82
More...

The following table shows the language versions of the article with the highest Authors’ Interest.

The highest AI

Language versions of the article "Flathead engine" with the highest Authors Interest (number of authors). Only registered Wikipedia users were taken into account.
#LanguageAI awardRelative AI
1English (en)
Flathead engine
130
2German (de)
SV-Ventilsteuerung
63
3French (fr)
Moteur à soupapes latérales
32
4Japanese (ja)
サイドバルブ
29
5Polish (pl)
Silnik dolnozaworowy
22
6Italian (it)
Valvole laterali
18
7Dutch (nl)
Zijklepmotor
18
8Swedish (sv)
Sidventilsmotor
16
9Czech (cs)
Side Valves
12
10Spanish (es)
Motor SV
11
More...

The following table shows the language versions of the article with the highest Authors’ Interest in the last month.

The highest AI in June 2026

Language versions of the article "Flathead engine" with the highest AI in June 2026
#LanguageAI awardRelative AI
1Catalan (ca)
Motor SV
1
2Czech (cs)
Side Valves
0
3German (de)
SV-Ventilsteuerung
0
4English (en)
Flathead engine
0
5Spanish (es)
Motor SV
0
6Persian (fa)
موتور سر تخت
0
7Finnish (fi)
Sivuventtiilimoottori
0
8French (fr)
Moteur à soupapes latérales
0
9Indonesian (id)
Mesin kepala datar
0
10Italian (it)
Valvole laterali
0
More...

The following table shows the language versions of the article with the highest number of citations.

The highest CI

Language versions of the article "Flathead engine" with the highest Citation Index (CI)
#LanguageCI awardRelative CI
1Dutch (nl)
Zijklepmotor
792
2English (en)
Flathead engine
752
3German (de)
SV-Ventilsteuerung
691
4Italian (it)
Valvole laterali
520
5Japanese (ja)
サイドバルブ
477
6French (fr)
Moteur à soupapes latérales
345
7Catalan (ca)
Motor SV
140
8Swedish (sv)
Sidventilsmotor
138
9Polish (pl)
Silnik dolnozaworowy
124
10Czech (cs)
Side Valves
108
More...

Scores

Estimated value for Wikipedia:
English:
Global:
Popularity in June 2026:
English:
Global:
Popularity in all years:
English:
Global:
Authors in June 2026:
English:
Global:
Registered authors in all years:
English:
Global:
Citations:
English:
Global:

Quality measures

Interwikis

#LanguageValue
caCatalan
Motor SV
csCzech
Side Valves
deGerman
SV-Ventilsteuerung
enEnglish
Flathead engine
esSpanish
Motor SV
faPersian
موتور سر تخت
fiFinnish
Sivuventtiilimoottori
frFrench
Moteur à soupapes latérales
idIndonesian
Mesin kepala datar
itItalian
Valvole laterali
jaJapanese
サイドバルブ
nlDutch
Zijklepmotor
plPolish
Silnik dolnozaworowy
ptPortuguese
Motor de válvulas laterais
svSwedish
Sidventilsmotor
ukUkrainian
Двигун з плоскою головкою
viVietnamese
Cơ cấu phối khí xupap đặt

Popularity rank trends

Best Rank English:
#33457
05.2011
Global:
#50932
05.2011

AI rank trends

Best Rank English:
#37441
02.2016
Global:
#42087
09.2007

Languages comparison

Important global interconnections (July 2025 – June 2026)

Wikipedia readers most often find their way to information on Flathead engine from Wikipedia articles about Overhead valve, Ford flathead V8 engine, Harley-Davidson engine timeline, Willys Go Devil engine and Overhead-camshaft valvetrain. Whereas reading the article about Flathead engine people most often go to Wikipedia articles on D-Motor, Overhead valve, IOE engine, Heron cylinder head and Overhead-camshaft valvetrain.

Cumulative results of quality and popularity of the Wikipedia article

List of Wikipedia articles in different languages (starting with the most popular):

News from 1 July 2026

On 1 July 2026 in multilingual Wikipedia, Internet users most often read articles on the following topics: 2026 FIFA World Cup, Kylian Mbappé, Erling Haaland, Democratic Republic of the Congo, FIFA World Cup, Harry Kane, Romelu Lukaku, Senegal, Michael Olise, Sadio Mané.

In English Wikipedia the most popular articles on that day were: 2026 FIFA World Cup, Harry Kane, Julián Quiñones, List of FIFA World Cup top goalscorers, Kylian Mbappé, Democratic Republic of the Congo, Erling Haaland, DR Congo national football team, Melat Kiros, FIFA World Cup.

About WikiRank

The WikiRank project is intended for automatic relative evaluation of the articles in the various language versions of Wikipedia. At the moment the service allows to compare over 50 million Wikipedia articles in 55 languages. Quality scores of articles are based on Wikipedia dumps from July, 2026. When calculating current popularity and AI of articles data from June 2026 was taken into account. For historical values of popularity and AI WikiRank used data from 2001 to 2026... More information