I am not intending to spoil "Corolla" thread with "Civic"; but if we keep ourselves abstract; I guess this will be useful for both
From 2008 Honda Civic Sedan Specifications - Honda.com I found out the following gear ratios of Civic M/T and Civic A/T
<TABLE style="WIDTH: 122pt; BORDER-COLLAPSE: collapse" border=0 cellSpacing=0 cellPadding=0 width=163><COLGROUP><COL style="WIDTH: 55pt; mso-width-source: userset; mso-width-alt: 2669" width=73><COL style="WIDTH: 35pt; mso-width-source: userset; mso-width-alt: 1718" width=47><COL style="WIDTH: 32pt; mso-width-source: userset; mso-width-alt: 1572" width=43><TBODY><TR style="HEIGHT: 15pt" height=20><TD style="BORDER-BOTTOM: black 0.5pt solid; BORDER-LEFT: black 0.5pt solid; WIDTH: 55pt; FONT-FAMILY: Calibri; BACKGROUND: black; HEIGHT: 15pt; COLOR: white; FONT-SIZE: 11pt; BORDER-TOP: black 0.5pt solid; FONT-WEIGHT: 700; BORDER-RIGHT: #d4d0c8; TEXT-DECORATION: none; text-underline-style: none; text-line-through: none; mso-pattern: black none" class=xl63 height=20 width=73>Gear</TD><TD style="BORDER-BOTTOM: black 0.5pt solid; BORDER-LEFT: #d4d0c8; WIDTH: 35pt; FONT-FAMILY: Calibri; BACKGROUND: black; COLOR: white; FONT-SIZE: 11pt; BORDER-TOP: black 0.5pt solid; FONT-WEIGHT: 700; BORDER-RIGHT: #d4d0c8; TEXT-DECORATION: none; text-underline-style: none; text-line-through: none; mso-pattern: black none" class=xl63 width=47>M/T</TD><TD style="BORDER-BOTTOM: black 0.5pt solid; BORDER-LEFT: #d4d0c8; WIDTH: 32pt; FONT-FAMILY: Calibri; BACKGROUND: black; COLOR: white; FONT-SIZE: 11pt; BORDER-TOP: black 0.5pt solid; FONT-WEIGHT: 700; BORDER-RIGHT: black 0.5pt solid; TEXT-DECORATION: none; text-underline-style: none; text-line-through: none; mso-pattern: black none" class=xl63 width=43>A/T</TD></TR><TR style="HEIGHT: 15pt" height=20><TD style="BORDER-BOTTOM: black 0.5pt solid; BORDER-LEFT: black 0.5pt solid; FONT-FAMILY: Calibri; BACKGROUND: #d8d8d8; HEIGHT: 15pt; COLOR: black; FONT-SIZE: 11pt; BORDER-TOP: #d4d0c8; FONT-WEIGHT: 400; BORDER-RIGHT: #d4d0c8; TEXT-DECORATION: none; text-underline-style: none; text-line-through: none; mso-pattern: #D8D8D8 none" height=20 align=right>1</TD><TD style="BORDER-BOTTOM: black 0.5pt solid; BORDER-LEFT: #d4d0c8; FONT-FAMILY: Calibri; BACKGROUND: #d8d8d8; COLOR: black; FONT-SIZE: 11pt; BORDER-TOP: #d4d0c8; FONT-WEIGHT: 400; BORDER-RIGHT: #d4d0c8; TEXT-DECORATION: none; text-underline-style: none; text-line-through: none; mso-pattern: #D8D8D8 none" align=right>3.143</TD><TD style="BORDER-BOTTOM: black 0.5pt solid; BORDER-LEFT: #d4d0c8; FONT-FAMILY: Calibri; BACKGROUND: #d8d8d8; COLOR: black; FONT-SIZE: 11pt; BORDER-TOP: #d4d0c8; FONT-WEIGHT: 400; BORDER-RIGHT: black 0.5pt solid; TEXT-DECORATION: none; text-underline-style: none; text-line-through: none; mso-pattern: #D8D8D8 none" align=right>2.666</TD></TR><TR style="HEIGHT: 15pt" height=20><TD style="BORDER-BOTTOM: black 0.5pt solid; BORDER-LEFT: black 0.5pt solid; BACKGROUND-COLOR: transparent; FONT-FAMILY: Calibri; HEIGHT: 15pt; COLOR: black; FONT-SIZE: 11pt; BORDER-TOP: #d4d0c8; FONT-WEIGHT: 400; BORDER-RIGHT: #d4d0c8; TEXT-DECORATION: none; text-underline-style: none; text-line-through: none" height=20 align=right>2</TD><TD style="BORDER-BOTTOM: black 0.5pt solid; BORDER-LEFT: #d4d0c8; BACKGROUND-COLOR: transparent; FONT-FAMILY: Calibri; COLOR: black; FONT-SIZE: 11pt; BORDER-TOP: #d4d0c8; FONT-WEIGHT: 400; BORDER-RIGHT: #d4d0c8; TEXT-DECORATION: none; text-underline-style: none; text-line-through: none" align=right>1.87</TD><TD style="BORDER-BOTTOM: black 0.5pt solid; BORDER-LEFT: #d4d0c8; BACKGROUND-COLOR: transparent; FONT-FAMILY: Calibri; COLOR: black; FONT-SIZE: 11pt; BORDER-TOP: #d4d0c8; FONT-WEIGHT: 400; BORDER-RIGHT: black 0.5pt solid; TEXT-DECORATION: none; text-underline-style: none; text-line-through: none" align=right>1.543</TD></TR><TR style="HEIGHT: 15pt" height=20><TD style="BORDER-BOTTOM: black 0.5pt solid; BORDER-LEFT: black 0.5pt solid; FONT-FAMILY: Calibri; BACKGROUND: #d8d8d8; HEIGHT: 15pt; COLOR: black; FONT-SIZE: 11pt; BORDER-TOP: #d4d0c8; FONT-WEIGHT: 400; BORDER-RIGHT: #d4d0c8; TEXT-DECORATION: none; text-underline-style: none; text-line-through: none; mso-pattern: #D8D8D8 none" height=20 align=right>3</TD><TD style="BORDER-BOTTOM: black 0.5pt solid; BORDER-LEFT: #d4d0c8; FONT-FAMILY: Calibri; BACKGROUND: #d8d8d8; COLOR: black; FONT-SIZE: 11pt; BORDER-TOP: #d4d0c8; FONT-WEIGHT: 400; BORDER-RIGHT: #d4d0c8; TEXT-DECORATION: none; text-underline-style: none; text-line-through: none; mso-pattern: #D8D8D8 none" align=right>1.235</TD><TD style="BORDER-BOTTOM: black 0.5pt solid; BORDER-LEFT: #d4d0c8; FONT-FAMILY: Calibri; BACKGROUND: #d8d8d8; COLOR: black; FONT-SIZE: 11pt; BORDER-TOP: #d4d0c8; FONT-WEIGHT: 400; BORDER-RIGHT: black 0.5pt solid; TEXT-DECORATION: none; text-underline-style: none; text-line-through: none; mso-pattern: #D8D8D8 none" align=right>1.022</TD></TR><TR style="HEIGHT: 15pt" height=20><TD style="BORDER-BOTTOM: black 0.5pt solid; BORDER-LEFT: black 0.5pt solid; BACKGROUND-COLOR: transparent; FONT-FAMILY: Calibri; HEIGHT: 15pt; COLOR: black; FONT-SIZE: 11pt; BORDER-TOP: #d4d0c8; FONT-WEIGHT: 400; BORDER-RIGHT: #d4d0c8; TEXT-DECORATION: none; text-underline-style: none; text-line-through: none" height=20 align=right>4</TD><TD style="BORDER-BOTTOM: black 0.5pt solid; BORDER-LEFT: #d4d0c8; BACKGROUND-COLOR: transparent; FONT-FAMILY: Calibri; COLOR: black; FONT-SIZE: 11pt; BORDER-TOP: #d4d0c8; FONT-WEIGHT: 400; BORDER-RIGHT: #d4d0c8; TEXT-DECORATION: none; text-underline-style: none; text-line-through: none" align=right>0.949</TD><TD style="BORDER-BOTTOM: black 0.5pt solid; BORDER-LEFT: #d4d0c8; BACKGROUND-COLOR: transparent; FONT-FAMILY: Calibri; COLOR: black; FONT-SIZE: 11pt; BORDER-TOP: #d4d0c8; FONT-WEIGHT: 400; BORDER-RIGHT: black 0.5pt solid; TEXT-DECORATION: none; text-underline-style: none; text-line-through: none" align=right>0.721</TD></TR><TR style="HEIGHT: 15pt" height=20><TD style="BORDER-BOTTOM: black 0.5pt solid; BORDER-LEFT: black 0.5pt solid; FONT-FAMILY: Calibri; BACKGROUND: #d8d8d8; HEIGHT: 15pt; COLOR: black; FONT-SIZE: 11pt; BORDER-TOP: #d4d0c8; FONT-WEIGHT: 400; BORDER-RIGHT: #d4d0c8; TEXT-DECORATION: none; text-underline-style: none; text-line-through: none; mso-pattern: #D8D8D8 none" height=20 align=right>5</TD><TD style="BORDER-BOTTOM: black 0.5pt solid; BORDER-LEFT: #d4d0c8; FONT-FAMILY: Calibri; BACKGROUND: #d8d8d8; COLOR: black; FONT-SIZE: 11pt; BORDER-TOP: #d4d0c8; FONT-WEIGHT: 400; BORDER-RIGHT: #d4d0c8; TEXT-DECORATION: none; text-underline-style: none; text-line-through: none; mso-pattern: #D8D8D8 none" align=right>0.727</TD><TD style="BORDER-BOTTOM: black 0.5pt solid; BORDER-LEFT: #d4d0c8; FONT-FAMILY: Calibri; BACKGROUND: #d8d8d8; COLOR: black; FONT-SIZE: 11pt; BORDER-TOP: #d4d0c8; FONT-WEIGHT: 400; BORDER-RIGHT: black 0.5pt solid; TEXT-DECORATION: none; text-underline-style: none; text-line-through: none; mso-pattern: #D8D8D8 none" align=right>0.525</TD></TR><TR style="HEIGHT: 15pt" height=20><TD style="BORDER-BOTTOM: black 0.5pt solid; BORDER-LEFT: black 0.5pt solid; BACKGROUND-COLOR: transparent; FONT-FAMILY: Calibri; HEIGHT: 15pt; COLOR: black; FONT-SIZE: 11pt; BORDER-TOP: #d4d0c8; FONT-WEIGHT: 400; BORDER-RIGHT: #d4d0c8; TEXT-DECORATION: none; text-underline-style: none; text-line-through: none" height=20>Reverse</TD><TD style="BORDER-BOTTOM: black 0.5pt solid; BORDER-LEFT: #d4d0c8; BACKGROUND-COLOR: transparent; FONT-FAMILY: Calibri; COLOR: black; FONT-SIZE: 11pt; BORDER-TOP: #d4d0c8; FONT-WEIGHT: 400; BORDER-RIGHT: #d4d0c8; TEXT-DECORATION: none; text-underline-style: none; text-line-through: none" align=right>3.308</TD><TD style="BORDER-BOTTOM: black 0.5pt solid; BORDER-LEFT: #d4d0c8; BACKGROUND-COLOR: transparent; FONT-FAMILY: Calibri; COLOR: black; FONT-SIZE: 11pt; BORDER-TOP: #d4d0c8; FONT-WEIGHT: 400; BORDER-RIGHT: black 0.5pt solid; TEXT-DECORATION: none; text-underline-style: none; text-line-through: none" align=right>1.957</TD></TR><TR style="HEIGHT: 15pt" height=20><TD style="BORDER-BOTTOM: black 0.5pt solid; BORDER-LEFT: black 0.5pt solid; FONT-FAMILY: Calibri; BACKGROUND: #d8d8d8; HEIGHT: 15pt; COLOR: black; FONT-SIZE: 11pt; BORDER-TOP: #d4d0c8; FONT-WEIGHT: 400; BORDER-RIGHT: #d4d0c8; TEXT-DECORATION: none; text-underline-style: none; text-line-through: none; mso-pattern: #D8D8D8 none" height=20>Final Drive</TD><TD style="BORDER-BOTTOM: black 0.5pt solid; BORDER-LEFT: #d4d0c8; FONT-FAMILY: Calibri; BACKGROUND: #d8d8d8; COLOR: black; FONT-SIZE: 11pt; BORDER-TOP: #d4d0c8; FONT-WEIGHT: 400; BORDER-RIGHT: #d4d0c8; TEXT-DECORATION: none; text-underline-style: none; text-line-through: none; mso-pattern: #D8D8D8 none" align=right>4.294</TD><TD style="BORDER-BOTTOM: black 0.5pt solid; BORDER-LEFT: #d4d0c8; FONT-FAMILY: Calibri; BACKGROUND: #d8d8d8; COLOR: black; FONT-SIZE: 11pt; BORDER-TOP: #d4d0c8; FONT-WEIGHT: 400; BORDER-RIGHT: black 0.5pt solid; TEXT-DECORATION: none; text-underline-style: none; text-line-through: none; mso-pattern: #D8D8D8 none" align=right>4.437</TD></TR></TBODY></TABLE>
What I understand is that in 5th gear for each revolution of the tyre; engine is revolving @ 0.727 in M/T and @ 0.525 in A/T. Keeping the difference in small gears is understandable that it might be to avoid frequent gear changes etc. Please correct me if I am wrong.
Why such difference is kept in the last gear? If someone with knowledge can translate what this means in layman language will be appreciated