I own one and based on my calculations it ranges from 7.8 to 8.4 L / 100 km. All depending on what you're carrying inside, tire pressure, etc..
The 2009 Hyundai Elantra runs on regular unleaded.
The 2002 Hyundai Elantra runs on regular unleaded.
The 2007 Hyundai Elantra runs on regular unleaded.
The 2012 Hyundai Elantra runs on regular unleaded.
The 2008 Hyundai Elantra runs on regular unleaded.
The 2010 Hyundai Elantra runs on regular unleaded.
The 2014 Hyundai Elantra runs on regular unleaded.
The 2006 Hyundai Elantra runs on regular unleaded.
The 2013 Hyundai Elantra runs on regular unleaded.
The 2004 Hyundai Elantra runs on regular unleaded.
The 2001 Hyundai Elantra runs on regular unleaded.
The 2003 Hyundai Elantra runs on regular unleaded.