Side Valves

Flathead engine - a type of four-stroke engine. Article “Side Valves” in Czech Wikipedia has 19.8 points for quality (as of July 1, 2026). The article contains 2 references and 8 sections.

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

Since the creation of article “Side Valves”, its content was written by 12 registered users of Czech Wikipedia and edited by 379 registered Wikipedia users in all languages.

The article is cited 108 times in Czech Wikipedia and cited 4306 times in all languages.

The highest Authors Interest rank from 2001:

• Local (Czech): #3200 in September 2007
• Global: #42087 in September 2007

The highest popularity rank from 2008:

• Local (Czech): #33093 in August 2010
• 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.

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

More...

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

The most popular language versions of the article "Side Valves" in all the time

#	Language	Popularity award	Relative popularity
1	English (en) Flathead engine		1 607 111
2	Japanese (ja) サイドバルブ		320 101
3	Polish (pl) Silnik dolnozaworowy		285 763
4	German (de) SV-Ventilsteuerung		252 203
5	Spanish (es) Motor SV		104 191
6	French (fr) Moteur à soupapes latérales		73 897
7	Dutch (nl) Zijklepmotor		67 391
8	Italian (it) Valvole laterali		53 396
9	Czech (cs) Side Valves		32 888
10	Swedish (sv) Sidventilsmotor		30 712

More...

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

The most popular language versions of the article "Side Valves" in June 2026

#	Language	Popularity award	Relative popularity
1	English (en) Flathead engine		4 234
2	Japanese (ja) サイドバルブ		712
3	German (de) SV-Ventilsteuerung		672
4	Polish (pl) Silnik dolnozaworowy		562
5	French (fr) Moteur à soupapes latérales		228
6	Spanish (es) Motor SV		147
7	Czech (cs) Side Valves		113
8	Finnish (fi) Sivuventtiilimoottori		98
9	Swedish (sv) Sidventilsmotor		96
10	Italian (it) Valvole laterali		82

More...

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

Language versions of the article "Side Valves" with the highest Authors Interest (number of authors). Only registered Wikipedia users were taken into account.

#	Language	AI award	Relative AI
1	English (en) Flathead engine		130
2	German (de) SV-Ventilsteuerung		63
3	French (fr) Moteur à soupapes latérales		32
4	Japanese (ja) サイドバルブ		29
5	Polish (pl) Silnik dolnozaworowy		22
6	Italian (it) Valvole laterali		18
7	Dutch (nl) Zijklepmotor		18
8	Swedish (sv) Sidventilsmotor		16
9	Czech (cs) Side Valves		12
10	Spanish (es) Motor SV		11

More...

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

Language versions of the article "Side Valves" with the highest AI in June 2026

#	Language	AI award	Relative AI
1	Catalan (ca) Motor SV		1
2	Czech (cs) Side Valves		0
3	German (de) SV-Ventilsteuerung		0
4	English (en) Flathead engine		0
5	Spanish (es) Motor SV		0
6	Persian (fa) موتور سر تخت		0
7	Finnish (fi) Sivuventtiilimoottori		0
8	French (fr) Moteur à soupapes latérales		0
9	Indonesian (id) Mesin kepala datar		0
10	Italian (it) Valvole laterali		0

More...

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

Language versions of the article "Side Valves" with the highest Citation Index (CI)

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

More...

#	Language	Value
ca	Catalan Motor SV
cs	Czech Side Valves
de	German SV-Ventilsteuerung
en	English Flathead engine
es	Spanish Motor SV
fa	Persian موتور سر تخت
fi	Finnish Sivuventtiilimoottori
fr	French Moteur à soupapes latérales
id	Indonesian Mesin kepala datar
it	Italian Valvole laterali
ja	Japanese サイドバルブ
nl	Dutch Zijklepmotor
pl	Polish Silnik dolnozaworowy
pt	Portuguese Motor de válvulas laterais
sv	Swedish Sidventilsmotor
uk	Ukrainian Двигун з плоскою головкою
vi	Vietnamese Cơ cấu phối khí xupap đặt

Best Rank

Czech: #33093 08.2010

Global: #50932 05.2011

Best Rank

Czech: #3200 09.2007

Global: #42087 09.2007

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In Czech Wikipedia the most popular articles on that day were: Simona Monyová, Konžská demokratická republika, Mistrovství světa ve fotbale 2026, Senegal, Boris Ingr, Sára Milfajtová, Barbora Krejčíková, Erling Haaland, Bitva na Sommě, Marko Čermák.

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